CI: Add cron workflow for gTLD update PRs, deprecate tld-update-bot.

.github/workflows/tld-update.yml

@@ -0,0 +1,46 @@
+name: tld-update
+on:
+  schedule:
+    # Run every hour, at the 15 minute mark. E.g.
+    # 2020-11-29 00:15:00 UTC, 2020-11-29 01:15:00 UTC, 2020-11-29 02:15:00 UTC
+    - cron:  '15 * * * *'
+jobs:
+  zlint-gtld-update:
+    name: Check for TLD data updates
+    runs-on: ubuntu-latest
+    steps:
+
+      - name: Check out code
+        uses: actions/checkout@v2
+
+      - name: Set up Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ^1.15
+
+      - name: Set current date as env variable
+        run: echo "NOW=$(date +'%Y-%m-%dT%H:%M:%S %Z')" >> $GITHUB_ENV
+
+      - name: Install zlint-gtld-update
+        run: go install ./cmd/zlint-gtld-update/...
+        working-directory: v3
+
+      - name: Run go-generate
+        run: go generate ./...
+        working-directory: v3
+
+      - name: Create pull-request
+        id: cpr
+        uses: peter-evans/create-pull-request@v3
+        with:
+          commit-message: "util: gtld_map autopull updates for ${{ env.NOW }}"
+          title: "util: gtld_map autopull updates for ${{ env.NOW }}"
+          body: "ZLint gTLD data updates from `go generate ./...` for ${{ env.NOW }}."
+          labels: tld-update
+          branch: zlint-gtld-update
+          delete-branch: true
+
+      - name: Check outputs
+        run: |
+          echo "Pull Request Number - ${{ steps.cpr.outputs.pull-request-number }}"
+          echo "Pull Request URL - ${{ steps.cpr.outputs.pull-request-url }}"