🌱 Bump alpine from 3.21.0 to 3.21.2

Bumps alpine from 3.21.0 to 3.21.2.

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

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

Dockerfile

@@ -11,7 +11,7 @@ COPY sentry ./sentry
 RUN go mod download
 RUN go build -a -ldflags '-extldflags "-static"' -o /bin/linode-cloud-controller-manager-linux /linode
 
-FROM alpine:3.21.0
+FROM alpine:3.21.2
 RUN apk add --update --no-cache ca-certificates
 LABEL maintainers="Linode"
 LABEL description="Linode Cloud Controller Manager"