Use RubyGem's official publish action

https://github.com/segiddins/rubygems-await

.github/workflows/publish.yml

@@ -5,16 +5,21 @@ on:
     tags:
       - v*
 jobs:
-  build:
+  push:
     runs-on: ubuntu-latest
 
+    permissions:
+      contents: write
+      id-token: write
+
     steps:
-      - uses: actions/checkout@v3
+      # Set up
+      - uses: actions/checkout@v4
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          bundler-cache: true
+          ruby-version: ruby
 
-      - name: Release GEM
-        if: contains(github.ref, 'refs/tags/v')
-        uses: cadwallion/publish-rubygems-action@master
-        env:
-          GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
-          RUBYGEMS_API_KEY: ${{secrets.RUBYGEMS_API_KEY}}
-          RELEASE_COMMAND: ./bin/release.sh
+      # Release
+      - uses: rubygems/release-gem@v1