chore: Add trunk branch to matrix

Author: aragon999

.github/workflows/build-docker-images.yaml

@@ -291,6 +291,10 @@ jobs:
             php-version: "8.3"
             flavour: alpine
             template: https://github.com/shopware/shopware
+          - shopware-version: trunk
+            php-version: "8.3"
+            flavour: alpine
+            template: https://github.com/shopware/shopware
           - shopware-version: v6.4.0.0
             php-version: "7.4"
             flavour: debian
@@ -467,6 +471,10 @@ jobs:
             php-version: "8.3"
             flavour: debian
             template: https://github.com/shopware/shopware
+          - shopware-version: trunk
+            php-version: "8.3"
+            flavour: debian
+            template: https://github.com/shopware/shopware
 
     steps:
       - name: Clone