Update Docker image versioning in workflow to use short SHA format for branch prefix

Author: matank001

.github/workflows/docker-publish.yml

@@ -49,7 +49,7 @@ jobs:
             type=semver,pattern={{version}}
             type=semver,pattern={{major}}.{{minor}}
             type=semver,pattern={{major}}
-            type=sha,prefix={{branch}}-
+            type=sha,prefix=sha-,format=short
             type=raw,value=latest,enable={{is_default_branch}}
 
       - name: Build and push Docker image