fixup! ci(32bit): use custom image to run PHP unit tests on 32bit

Author: susnux

.github/workflows/phpunit-32bits.yml

@@ -26,7 +26,7 @@ jobs:
 
     if: ${{ github.repository_owner != 'nextcloud-gmbh' }}
 
-    container: ghcr.io/nextcloud/continuous-integration-php8.3-32bits:latest
+    container: ghcr.io/nextcloud/continuous-integration-php8.4-32bit:latest
 
     strategy:
       fail-fast: false