chore: Bump alpine from 3.21.0 to 3.21.2 in /build/common

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] <[email protected]>

Author: dependabot[bot]

build/common/Dockerfile

@@ -12,7 +12,7 @@ COPY . ./
 RUN CGO_ENABLED=0 GOOS=linux GOARCH=$(go env GOARCH) go build -ldflags="-s -w" ./cmd/$COMPONENT
 
 
-FROM alpine:3.21.0
+FROM alpine:3.21.2
 
 RUN apk update && \
     apk add --no-cache ca-certificates && \