Make bookworm the new default for php82 images

Part of #179

Author: stronk7

.github/workflows/test_buildx_and_publish.yml

@@ -71,7 +71,7 @@ jobs:
             latest=false
           tags: |
             type=raw,value={{branch}}
-            # Not the default yet (bullseye is): type=match,pattern=(\d+.\d+),value={{branch}}
+            type=match,pattern=(\d+.\d+),value={{branch}}
 
       # https://github.com/docker/setup-qemu-action#usage
       - name: Set up QEMU