Bump library/alpine

Bumps the docker-dependencies group with 1 update in the /services/testing-framework directory: library/alpine.


Updates `library/alpine` from 3.20 to 3.21

---
updated-dependencies:
- dependency-name: library/alpine
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: docker-dependencies
...

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

Author: dependabot[bot]

services/testing-framework/Dockerfile

@@ -23,7 +23,7 @@ COPY . .
 WORKDIR /go/services/testing-framework
 RUN CGO_ENABLED=0 go test -c -run TestClaudie
 
-FROM docker.io/library/alpine:3.20
+FROM docker.io/library/alpine:3.21
 #Add repository label
 LABEL org.opencontainers.image.source "https://github.com/berops/claudie"
 #Add image name as a label