ci: Setup Weekly Releases (open-telemetry#949)

This job will create a release request every week at least one hour before or during the Ruby SIG.

This will ensure are aware of any pending releases during the SIG meeting and choose to submit a release.

.github/workflows/release-request-weekly.yml

@@ -0,0 +1,28 @@
+name: Weekly release request
+
+on:
+  schedule:
+    - cron: "0 0 * * 0"
+
+jobs:
+  release-request:
+    if: ${{ github.repository == 'open-telemetry/opentelemetry-ruby-contrib' }}
+    env:
+      ruby_version: "3.0"
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install Ruby ${{ env.ruby_version }}
+        uses: ruby/[email protected]
+        with:
+          ruby-version: ${{ env.ruby_version }}
+      - name: Checkout repo
+        uses: actions/checkout@v4
+      - name: Install Toys
+        run: "gem install --no-document toys -v 0.15.5"
+      - name: Open release pull request
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          toys release request --yes --verbose \
+            "--release-ref=${{ github.ref }}" \
+            < /dev/null