Bump alpine from 3.18.3 to 3.18.4 (#115)

Bumps alpine from 3.18.3 to 3.18.4.

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

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

Dockerfile

@@ -13,7 +13,7 @@ COPY . .
 
 RUN go install -ldflags="-X 'main.version=${ACTION_VERSION}'"
 
-FROM alpine:3.18.3
+FROM alpine:3.18.4
 
 LABEL repository="https://github.com/morphy2k/revive-action"
 LABEL homepage="https://github.com/morphy2k/revive-action"