chore(deps): update php docker tag to v8.3.9 (#238)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

renovate.Dockerfile

@@ -16,4 +16,4 @@ ENV PHP_VERSION=8.2.21
 
 # EOL: 2026-11-23
 # renovate: datasource=docker depName=php versioning=docker
-ENV PHP_VERSION=8.3.8
+ENV PHP_VERSION=8.3.9