Add dependabot auto-merge for pull requests

Signed-off-by: Josh Cummings <3627351+jzheaux@users.noreply.github.com>

Author: jzheaux

.github/workflows/dependabot-automerge.yml

@@ -0,0 +1,17 @@
+name: Merge Dependabot PR
+
+on:
+  pull_request:
+    branches:
+      - main
+      - '*.x'
+
+run-name: Merge Dependabot PR ${{ github.ref_name }}
+
+jobs:
+  merge-dependabot-pr:
+    permissions: write-all
+    uses: spring-io/spring-github-workflows/.github/workflows/spring-merge-dependabot-pr.yml@v7
+    with:
+      mergeArguments: --auto --rebase
+