update handling of latest tag

.github/workflows/build-standalone.yaml

@@ -23,6 +23,9 @@ jobs:
             type=ref,event=branch,branch=dev,suffix=-{{sha}},optional=true
             type=ref,event=branch,branch=dev,value=dev,optional=true
             type=match,event=tag,pattern=v(.*),group=1,prefix=v,optional=true
+            type=match,event=tag,pattern=v(.*),value=latest,optional=true
+          flavor: |
+            latest=false
 
       - name: Print (debug) Docker meta JSON
         uses: https://github.com/actions/github-script@v7