Release django-stubs-ext before django-stubs (#2188)

Author: flaeppe

.github/workflows/release.yml

@@ -4,12 +4,15 @@ on:
   release:
     types: [published]
 
+concurrency:
+  group: release-${{ github.event.release.tag_name }}
+
 jobs:
-  build-and-publish:
+  build-and-publish-ext:
     runs-on: ubuntu-latest
     environment:
-      name: release
-      url: https://pypi.org/p/django-stubs
+      name: release-ext
+      url: https://pypi.org/p/django-stubs-ext
     permissions:
       id-token: write
     steps:
@@ -22,16 +25,19 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      - name: Build package
-        run: python -m build
-      - name: Publish to PyPI
+      - name: Build ext package
+        run: python -m build ext/
+      - name: Publish ext to PyPI
         uses: pypa/[email protected]
+        with:
+          packages-dir: ext/dist/
 
-  build-and-publish-ext:
+  build-and-publish:
     runs-on: ubuntu-latest
+    needs: [build-and-publish-ext]
     environment:
-      name: release-ext
-      url: https://pypi.org/p/django-stubs-ext
+      name: release
+      url: https://pypi.org/p/django-stubs
     permissions:
       id-token: write
     steps:
@@ -44,9 +50,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      - name: Build ext package
-        run: python -m build ext/
-      - name: Publish ext to PyPI
+      - name: Build package
+        run: python -m build
+      - name: Publish to PyPI
         uses: pypa/[email protected]
-        with:
-          packages-dir: ext/dist/