Fix artifact upload: use existing zip archive, remove duplicate zip creation

.forgejo/workflows/build-artifacts.yml

@@ -253,11 +253,15 @@ jobs:
         run: |
           cd /tmp/deb-bootupd
           
-          # Create zip archive of artifacts
+          # Use the zip archive we already created
           artifact_name="deb-bootupd-artifacts-$(git rev-parse --short HEAD).zip"
-          zip -r "$artifact_name" build-artifacts/
           
-          echo "Created artifact archive: $artifact_name"
+          # Rename the existing zip if needed
+          if [ -f "deb-bootupd-artifacts.zip" ]; then
+            mv "deb-bootupd-artifacts.zip" "$artifact_name"
+          fi
+          
+          echo "Using artifact archive: $artifact_name"
           ls -la "$artifact_name"
           
           # Upload to Forgejo generic package registry