chore(deps): update alpine docker tag to v3.21.0

.gitlab-ci.yml

@@ -110,7 +110,7 @@ check-semantic-version:
   stage: .pre
   rules:
     - if: $CI_COMMIT_TAG
-  image: alpine:3.20.3
+  image: alpine:3.21.0
   before_script:
     - apk add perl
   script:
@@ -180,7 +180,7 @@ gitlab-opentofu-image:build:custom-runner:
 check-versions:
   stage: test
   needs: []
-  image: alpine:3.20.3
+  image: alpine:3.21.0
   before_script:
     - apk add coreutils yq patch git
   script:
@@ -190,7 +190,7 @@ check-versions:
 check-readme:
   stage: test
   needs: []
-  image: alpine:3.20.3
+  image: alpine:3.21.0
   before_script:
     - apk add coreutils yq make git
   script:
@@ -352,7 +352,7 @@ release:dry-run:
     RELEASE_TAG_NAME: '<dry-run>'
 
 old-states:
-  image: alpine:3.20.3
+  image: alpine:3.21.0
   stage: cleanup
   variables:
     REMOVE_STATES_UNTIL: 1 week ago

Dockerfile.alpine

-ARG BASE_IMAGE=alpine:3.20.3
+ARG BASE_IMAGE=alpine:3.21.0
 
 FROM $BASE_IMAGE