Bump python from 3.11.5-alpine to 3.12.3-alpine

Bumps python from 3.11.5-alpine to 3.12.3-alpine.

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

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

Dockerfile

@@ -7,7 +7,7 @@
 # NOTE: --ulimit is required to work around a limitation in Docker
 # Details: https://github.com/jorisroovers/gitlint/issues/129
 
-FROM python:3.11.5-alpine
+FROM python:3.12.3-alpine
 ARG GITLINT_VERSION
 
 RUN apk add git