fix github action on manual build

.github/workflows/build.yaml

@@ -210,8 +210,10 @@ jobs:
           echo "MAJOR_TAG=$M" >> $GITHUB_ENV
 
       # manifest for :1.2.3 tag
+      #  this has to run only if invoked by a new tag
       - name: Create and push manifest (:ve.rs.ion)
         uses: Noelware/docker-manifest-action@master
+        if: github.event_name != 'workflow_dispatch'
         with:
           base-image: ${{ secrets.DOCKER_IMAGE }}:${{ env.GIT_TAG }}
           extra-images: ${{ secrets.DOCKER_IMAGE }}:${{ env.GIT_TAG }}-amd64,${{ secrets.DOCKER_IMAGE }}:${{ env.GIT_TAG }}-arm64v8,${{ secrets.DOCKER_IMAGE }}:${{ env.GIT_TAG }}-armv7,${{ secrets.DOCKER_IMAGE }}:${{ env.GIT_TAG }}-i386