fix(deps): bump alpine from 3.21.1 to 3.21.2

Bumps alpine from 3.21.1 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]>

Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.21.1 AS setup-base
+FROM alpine:3.21.2 AS setup-base
 RUN apk --no-cache add curl~=8
 
 # renovate: datasource=github-releases depName=gruntwork-io/terragrunt