chore(go): bump go version and action versions

Author: Jumpy-Squirrel

.github/workflows/go.yml

@@ -16,14 +16,14 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Check out reg-paygate-adapter (primary)
-      uses: actions/checkout@v2
+      uses: actions/checkout@v5
       with:
         path: ./reg-paygate-adapter
 
     - name: Set up Go
-      uses: actions/setup-go@v2
+      uses: actions/setup-go@v6
       with:
-        go-version: '1.20'
+        go-version: '^1.25.0'
 
     - name: Build reg-paygate-adapter (primary)
       run: go build -v ./...

go.mod

@@ -1,6 +1,6 @@
 module github.com/eurofurence/reg-paygate-adapter
 
-go 1.21
+go 1.25
 
 require (
 	github.com/StephanHCB/go-autumn-logging v0.4.0