Bump golangci/golangci-lint-action from 4 to 6

Bumps [golangci/golangci-lint-action](https://github.com/golangci/golangci-lint-action) from 4 to 6.
- [Release notes](https://github.com/golangci/golangci-lint-action/releases)
- [Commits](golangci/golangci-lint-action@v4...v6)

---
updated-dependencies:
- dependency-name: golangci/golangci-lint-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/releasing.yaml

@@ -18,7 +18,7 @@ jobs:
         with:
           go-version-file: "go.mod"
       - name: Run golangci-lint
-        uses: golangci/golangci-lint-action@v4
+        uses: golangci/golangci-lint-action@v6
         with:
           version: latest
       - name: Test application

.github/workflows/testing.yml

@@ -15,7 +15,7 @@ jobs:
         with:
           go-version-file: "go.mod"
       - name: Run golangci-lint
-        uses: golangci/golangci-lint-action@v4
+        uses: golangci/golangci-lint-action@v6
         with:
           version: latest
       - name: Test application