chore(deps): bump alpine from 3.19.1 to 3.20.3

Bumps alpine from 3.19.1 to 3.20.3.

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

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

Dockerfile

@@ -8,7 +8,7 @@ COPY . /src/
 RUN make build CGO_ENABLED=0
 
 #--- Image stage
-FROM alpine:3.19.1
+FROM alpine:3.20.3
 
 COPY --from=go-builder /src/target/dist/s3-auth-proxy /usr/bin/s3-auth-proxy