Dockerfile(deps): Bump composer from 2.8.12 to 2.9.1

Bumps composer from 2.8.12 to 2.9.1.

---
updated-dependencies:
- dependency-name: composer
  dependency-version: 2.9.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Dockerfile

@@ -1,4 +1,4 @@
-FROM composer:2.8.12@sha256:5248900ab8b5f7f880c2d62180e40960cd87f60149ec9a1abfd62ac72a02577c AS builder
+FROM composer:2.9.1@sha256:7384cf9fa70b710af02c9f40bec6e44472e07138efa5ab3428a058087c0d2724 AS builder
 
 COPY composer.json /app/
 COPY composer.lock /app/