Dockerfile(deps): Bump composer from 2.6.2 to 2.6.3

Bumps composer from 2.6.2 to 2.6.3.

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

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

Dockerfile

@@ -1,4 +1,4 @@
-FROM composer:2.6.2@sha256:a8847e8317196aac538d532866a7ea67155aff42af729743c1394e3ed894a39f AS builder
+FROM composer:2.6.3@sha256:1ac7a547cb88acb0de62663b70f2b3d80ad27355288245159404b6ae40cd9ca3 AS builder
 
 COPY composer.json /app/
 COPY composer.lock /app/