Dockerfile(deps): Bump composer from 8209324 to c4f6b39

Bumps composer from `8209324` to `c4f6b39`.

---
updated-dependencies:
- dependency-name: composer
  dependency-version: 2.9.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Dockerfile

@@ -1,4 +1,4 @@
-FROM composer:2.9.2@sha256:8209324ed15c43af0c5cc900cbb9fd01e94b84a94c4bb0969aa95d31d2d7e43d AS builder
+FROM composer:2.9.2@sha256:c4f6b39889c396b86fd3603c047bb73929f05fcaa887e78f172d366e0891062b AS builder
 
 COPY composer.json /app/
 COPY composer.lock /app/