Unite dmg build jobs

.github/workflows/ci.yml

@@ -86,7 +86,7 @@ jobs:
     runs-on:
       - self-hosted
       - bundle
-    if: ${{ github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/v') }}
+    if: ${{ github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/v') || contains(github.event.pull_request.labels.*.name, 'run-build-dmg') }}
     needs: tests
     env:
       MACOS_CERTIFICATE: ${{ secrets.MACOS_CERTIFICATE }}
@@ -148,11 +148,11 @@ jobs:
       - name: Create app bundle
         run: script/bundle
 
-      - name: Upload app bundle to workflow run if main branch
+      - name: Upload app bundle to workflow run if main branch or specifi label
         uses: actions/upload-artifact@v2
-        if: ${{ github.ref == 'refs/heads/main' }}
+        if: ${{ github.ref == 'refs/heads/main' }} || contains(github.event.pull_request.labels.*.name, 'run-build-dmg') }}
         with:
-          name: Zed.dmg
+          name: Zed_${{ github.event.pull_request.head.sha || github.sha }}.dmg
           path: target/release/Zed.dmg
 
       - uses: softprops/action-gh-release@v1