changing docker hub update on release event

Author: tobiasehlert

.github/workflows/build.yml

@@ -82,7 +82,7 @@ jobs:
 
       - name: Docker Hub Description
         uses: peter-evans/dockerhub-description@v3
-        if: github.ref == 'refs/heads/main'
+        if: github.event_name == 'release'
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}