Bump golangci/golangci-lint-action from 6.3.0 to 6.4.0 (#470)

Bumps [golangci/golangci-lint-action](https://github.com/golangci/golangci-lint-action) from 6.3.0 to 6.4.0.
- [Release notes](https://github.com/golangci/golangci-lint-action/releases)
- [Commits](golangci/golangci-lint-action@e60da84...0adbc47)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -71,7 +71,7 @@ jobs:
           cache-dependency-path: backend/go.sum
           cache: false
       - name: golangci-lint
-        uses: golangci/golangci-lint-action@e60da84bfae8c7920a47be973d75e15710aa8bd7 # v6.3.0
+        uses: golangci/golangci-lint-action@0adbc47a5910e47adb692df88187ec8c73c76778 # v6.4.0
         with:
           working-directory: backend
           version: v1.61.0