Bump alpine from 3.21.0 to 3.21.2 in /database/migrations

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]

database/migrations/Dockerfile

@@ -4,7 +4,7 @@ RUN apk --no-cache add git
 RUN go install github.com/jackc/tern@latest
 
 # Build final image
-FROM alpine:3.21.0
+FROM alpine:3.21.2
 RUN addgroup -S clowarden && adduser -S clowarden -G clowarden
 USER clowarden
 WORKDIR /home/clowarden