build(deps): bump alpine from 3.19.4 to 3.20.3

Bumps alpine from 3.19.4 to 3.20.3.

---
updated-dependencies:
- dependency-name: alpine
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Dockerfile

@@ -48,7 +48,7 @@ RUN cd /cmfive-core/system/templates/base && \
 # This stage builds the final Cosine image
 
 # Use the Alpine Linux base image
-FROM alpine:3.19.4
+FROM alpine:3.20.3
 
 # PHP version
 # note: see Alpine packages for available versions