tweak auto-merge for dependabot

.github/workflows/dotnet.yml

@@ -111,14 +111,3 @@ jobs:
             dotnet nuget push $package --source https://api.nuget.org/v3/index.json --api-key ${{ secrets.NUGET_KEY }} --skip-duplicate
           done
 
-  dependabot:
-    runs-on: ubuntu-latest
-    needs: build
-    if: success() && github.event_name == 'pull_request' && github.actor == 'dependabot[bot]'
-
-    steps:
-      - name: Enable Auto-Merge for Dependabot PRs
-        run: gh pr merge --auto --merge "$PR_URL"
-        env:
-          PR_URL: ${{github.event.pull_request.html_url}}
-          GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}

.github/workflows/merge.yml

@@ -0,0 +1,24 @@
+name: Dependabot Auto-Merge
+on: pull_request
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  dependabot:
+    runs-on: ubuntu-latest
+    if: github.actor == 'dependabot[bot]'
+
+    steps:
+      - name: Dependabot Metadata
+        id: metadata
+        uses: dependabot/fetch-metadata@v2
+        with:
+          github-token: "${{ secrets.GITHUB_TOKEN }}"
+
+      - name: Enable Auto-Merge for Dependabot PRs
+        run: gh pr merge --auto --merge "$PR_URL"
+        env:
+          PR_URL: ${{github.event.pull_request.html_url}}
+          GH_TOKEN: ${{secrets.GITHUB_TOKEN}}