deps(docker): bump alpine from 3.19 to 3.20 (#53)

Bumps alpine from 3.19 to 3.20.

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Dockerfile

@@ -40,7 +40,7 @@ COPY --from=build /bin/${PKG_NAME}_${TARGETOS}-${TARGETARCH}${TARGETVARIANT} /${
 
 ENTRYPOINT [ "/sagemcom_fast_exporter" ]
 
-FROM alpine:3.19 AS alpine
+FROM alpine:3.20 AS alpine
 
 ARG PKG_NAME
 ARG VCS_REF