feat(deps): bump alpine from 3.19 to 3.20 (#98)

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] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Dockerfile

@@ -1,3 +1,3 @@
-FROM alpine:3.19
+FROM alpine:3.20
 COPY ansdoc /usr/bin/ansdoc
 ENTRYPOINT ["/usr/bin/ansdoc"]