chore(deps): bump alpine from 3.21 to 3.22

Bumps alpine from 3.21 to 3.22.

---
updated-dependencies:
- dependency-name: alpine
  dependency-version: '3.22'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Dockerfile

@@ -4,7 +4,7 @@ WORKDIR /app
 COPY . .
 RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o namespace-cleaner ./cmd/namespace-cleaner
 
-FROM alpine:3.21
+FROM alpine:3.22
 
 COPY --from=builder /app/namespace-cleaner /namespace-cleaner
 ENTRYPOINT ["/bin/sh"]