Adds a github actions workflow which pings related repos with a blank commit once a month to ensure their automation stays running (microsoft#46747)

Author: Orta Therox

.github/workflows/ensure-related-repos-run-crons.yml

@@ -0,0 +1,44 @@
+# Ensures that repos which are related to TypeScript but may not have regular commits
+# have their GitHub Actions scheduled jobs still active due to the 6 week timeout
+# on OSS repos. This has already triggered a few times with microsoft/TypeScript-Make-Monaco-Builds
+# so, better to automate keeping on top of it.
+
+name: Related Repo Commit Bumps
+
+on:
+    schedule:
+        # Monthly, https://crontab.guru/#0_0_*_1-12_*
+        - cron: '0 0 * 1-12 *'
+    workflow_dispatch: {}
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Configure git and update package-lock.json
+      run: |
+        git config user.email "typescriptbot@microsoft.com"
+        git config user.name "TypeScript Bot"
+
+    - uses: actions/checkout@v2
+      with: 
+        repository: 'microsoft/TypeScript-Website'
+        path: 'ts-site'
+
+    - name: Push Commit to TS Website
+      run:  |
+        cd ts-site
+        git commit --allow-empty -m "Monthly Bump"
+        git push https://${{ secrets.TS_BOT_GITHUB_TOKEN }}@github.com/microsoft/TypeScript-Website.git
+
+    - uses: actions/checkout@v2
+      with: 
+        repository: 'microsoft/TypeScript-Make-Monaco-Builds'
+        path: 'monaco-builds'
+
+    - name: Push Commit to TS Make Monaco Builds
+      run:  |
+        cd monaco-builds
+        git commit --allow-empty -m "Monthly Bump"
+        git push https://${{ secrets.TS_BOT_GITHUB_TOKEN }}@github.com/microsoft/TypeScript-Make-Monaco-Builds.git