Update publish-gem.yml

.github/workflows/publish-gem.yml

@@ -1 +1,22 @@
+name: Publish Gem
 
+on:
+  release:
+    types: [released]
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Setup Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.2'
+      - name: Build gem
+        run: |
+          gem build github-pages.gemspec
+      - name: Publish
+        run: |
+          gem push github-pages.gem --key ${{ secrets.PAGES_GEM_PUBLISH }}