Update backend-publish-azure.yml -- update to actions/checkout@v4 and actions/setup-dotnet@v4

Author: PaulLinYao

.github/workflows/backend-publish-azure.yml

@@ -42,14 +42,14 @@ env:
 
 jobs:
   build:
-    name: Build and Deploy .NET5 Web API
+    name: Build and Deploy .NET6 Web API
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Set up dotnet Core ${{ env.NETCORE_VERSION }}
-        uses: actions/setup-dotnet@v1
+        uses: actions/setup-dotnet@v4
         with:
           dotnet-version: ${{ env.NETCORE_VERSION }}
       - name: Restore dependencies (${{env.SOLUTION_FILE}})