Bump alpine from 3.20.3 to 3.21.2

Bumps alpine from 3.20.3 to 3.21.2.

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

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

Dockerfile

@@ -19,7 +19,7 @@ RUN VERSION=$(git describe --all --exact-match $(git rev-parse HEAD) | grep tags
   -X github.com/Templum/rabbitmq-connector/pkg/version.GitCommit=${GIT_COMMIT}" \
   -a -installsuffix cgo -o rmq-connector .
 
-FROM alpine:3.20.3
+FROM alpine:3.21.2
 
 RUN addgroup -S app \
   && adduser -S -g app app \