GitHub CI: Add set_pr_labels (#1467)

* GitHub CI: Add set_pr_labels

* Change to run every 10 min

* Update names

.github/workflows/set_pr_labels.yml

@@ -0,0 +1,36 @@
+name: Pull Requests
+on:
+  schedule:
+    - cron: '*/10 * * * *'
+
+jobs:
+  Set-Labels:
+    runs-on: ubuntu-18.04
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v1
+        with:
+          python-version: 3.6
+
+      - name: Cache pip
+        uses: actions/cache@v1
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-pip-${{ hashFiles('.github/org_control/requirements*.txt') }}
+          restore-keys: |
+            ${{ runner.os }}-pip-
+            ${{ runner.os }}-
+
+      - name: Install dependencies
+        run: |
+          pip install -r requirements.txt
+        working-directory: .github/org_control
+
+      - name: Check PRs
+        run: |
+          python3 check_pr.py
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        working-directory: .github/org_control