Bump alpine from 3.21.0 to 3.21.1

Bumps alpine from 3.21.0 to 3.21.1.

---
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]

Dockerfile

@@ -6,7 +6,7 @@ RUN set -ex \
   && go get -d ./... \
   && go build -o csp_collector main.go
 
-FROM alpine:3.21.0
+FROM alpine:3.21.1
 LABEL maintainer="https://github.com/jacobbednarz/go-csp-collector"
 COPY --from=build /go/src/jacobbednarz/go-csp-collector/csp_collector /
 EXPOSE 8080