Automatically assign next release milestone (#18827)

* Automatically assign next release milestone

* Automatically create milestone

* Rename workflow job

* Update to latest version

.github/workflows/assign-next-release-milestone.yml

@@ -0,0 +1,21 @@
+name: Assign Next Release Milestone
+
+on:
+  pull_request:
+    types:
+      - closed
+
+jobs:
+  assign:
+    name: Assign Milestone
+    if: github.event.pull_request.merged == true && github.base_ref == 'main'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: sv-tools/create-milestone-action@v1.4.1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          title: 'Next Release'
+      - uses: zoispag/action-assign-milestone@v1.1.0
+        with:
+          repo-token: '${{ secrets.GITHUB_TOKEN }}'
+          milestone: 'Next Release'