Update golangci/golangci-lint-action action to v6

Author: renovate[bot]

.github/workflows/codetests.yml

@@ -34,7 +34,7 @@ jobs:
           go-version: stable
       - uses: actions/checkout@v4
       - name: golangci-lint
-        uses: golangci/golangci-lint-action@v3
+        uses: golangci/golangci-lint-action@v6
         with:
           version: 'v1.55'
   # Runs golangci-lint on linux against linux and windows.
@@ -52,6 +52,6 @@ jobs:
           go-version: stable
       - uses: actions/checkout@v4
       - name: golangci-lint
-        uses: golangci/golangci-lint-action@v3
+        uses: golangci/golangci-lint-action@v6
         with:
           version: 'v1.55'