Bump alpine from 3.15.0 to 3.15.3

Bumps alpine from 3.15.0 to 3.15.3.

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

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

Dockerfile

@@ -13,7 +13,7 @@ COPY . .
 
 RUN go install -ldflags="-X 'main.version=${ACTION_VERSION}'"
 
-FROM alpine:3.15.0
+FROM alpine:3.15.3
 
 LABEL repository="https://github.com/morphy2k/revive-action"
 LABEL homepage="https://github.com/morphy2k/revive-action"