Merge pull request dnnsoftware#4755 from bdukes/release-10-workflow

Add workflow to auto-open PRs to v10 branch

.github/workflows/open-merged-pr-to-future.yml

@@ -0,0 +1,32 @@
+name: Open Merged PR to release/10.0.0 Branch
+
+on:
+  pull_request:
+    types: [closed]
+    branches:
+      - develop
+
+jobs:
+  open-merged-pr-to-release-branch:
+    runs-on: ubuntu-latest
+    if: ${{ github.event.pull_request.merged }}
+    steps:
+      - uses: actions/checkout@v2.3.4
+
+      - uses: peterjgrainger/action-create-branch@v2.0.1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          branch: v10/${{ github.event.pull_request.head.ref }}-${{ github.event.pull_request.head.sha }}
+
+      - name: Create Pull Request
+        uses: repo-sync/pull-request@v2.6
+        with:
+          source_branch: v10/${{ github.event.pull_request.head.ref }}-${{ github.event.pull_request.head.sha }}
+          destination_branch: release/10.0.0
+          pr_title: v10 ${{ github.event.pull_request.title }}
+          pr_body: |
+            Applying #${{ github.event.pull_request.number }} to release/10.0.0
+            ${{ github.event.pull_request.body }}
+          pr_label: ${{ join(github.event.pull_request.labels.*.name) }}
+          github_token: ${{ secrets.GITHUB_TOKEN }}