Create auto-merge.yaml

Ref. https://issues.redhat.com/browse/HACBS-2470

.github/workflows/auto-merge.yaml

@@ -0,0 +1,29 @@
+# Copyright The Enterprise Contract Contributors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+---
+name: 'Auto merge'
+'on':
+  pull_request_review:
+    types: [submitted]
+
+jobs:
+  auto-merge:
+    uses: enterprise-contract/github-workflows/.github/workflows/auto-merge.yaml@main
+    secrets: inherit
+    permissions:
+      pull-requests: write
+      contents: write