chore(deps): update actions/checkout action to v6

Author: renovate[bot]

.github/workflows/codeql-analysis-cron.yml

@@ -18,7 +18,7 @@ jobs:
           dotnet-version: "9.x"
 
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Initialize CodeQL
         uses: github/codeql-action/init@v4

.github/workflows/codeql-analysis.yml

@@ -18,7 +18,7 @@ jobs:
           dotnet-version: "9.x"
 
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Initialize CodeQL
         uses: github/codeql-action/init@v4

.github/workflows/publish-artifacthub.yml

@@ -9,7 +9,7 @@ jobs:
   upload-artifact-repo-config:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Install oras
         run: |
           curl -L https://github.com/oras-project/oras/releases/download/v1.1.0/oras_1.1.0_linux_amd64.tar.gz -o oras.tar.gz

.github/workflows/publish.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Install script dependencies
         run: npm install --prefix ./.ci
       - name: Docker Login
@@ -45,7 +45,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Install script dependencies
         run: npm install --prefix ./.ci
       - name: Docker Login
@@ -76,7 +76,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Install script dependencies
         run: npm install --prefix ./.ci
       - name: Docker Login
@@ -107,7 +107,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Install script dependencies
         run: npm install --prefix ./.ci
       - name: Docker Login
@@ -138,7 +138,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Install script dependencies
         run: npm install --prefix ./.ci
       - name: Docker Login
@@ -169,7 +169,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Install script dependencies
         run: npm install --prefix ./.ci
       - name: Docker Login
@@ -200,7 +200,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Install script dependencies
         run: npm install --prefix ./.ci
       - name: Docker Login
@@ -231,7 +231,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Install script dependencies
         run: npm install --prefix ./.ci
       - name: Docker Login
@@ -271,7 +271,7 @@ jobs:
       - publish-sse-server
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Install script dependencies
         run: npm install --prefix ./.ci
       - name: Install helm

.github/workflows/test.yml

@@ -17,7 +17,7 @@ jobs:
     name: Run Admin UI Checks
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Setup Flutter
         uses: subosito/[email protected]
       - name: Run checks
@@ -28,7 +28,7 @@ jobs:
     name: Check Formatting
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - uses: actions/setup-node@v6
         with:
           node-version: 24.11.1
@@ -58,7 +58,7 @@ jobs:
     name: Run Unit Tests
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - uses: actions/setup-node@v6
         with:
           node-version: 24.11.1
@@ -118,7 +118,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - uses: actions/setup-node@v6
         with:
@@ -187,7 +187,7 @@ jobs:
     needs: image-test-builds
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - uses: actions/setup-node@v6
         with:
@@ -262,12 +262,12 @@ jobs:
     needs: image-test-builds
     steps:
       - name: Checkout backbone repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           path: backbone
 
       - name: Checkout runtime repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           repository: nmshd/runtime
           path: runtime
@@ -331,7 +331,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Install script dependencies
         run: npm install --prefix ./.ci
       - name: Install helm
@@ -346,7 +346,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Setup Dotnet
         uses: actions/setup-dotnet@v5
         with: