Merge pull request #5 from planningcenter/bm/add-publish-gem

Add the publish-gem-release workflow.

.github/workflows/publish-gem-release.yml

@@ -0,0 +1,21 @@
+name: Publish Gem Release
+
+on:
+  push:
+    tags:
+      - v*
+
+jobs:
+  publish-release:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout Code
+        uses: actions/checkout@v3
+      - uses: planningcenter/gh-action-publish-internal-gem@v1
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}