add workflow to download labels that had their label deleted

.github/workflows/restore_labels.yml

@@ -0,0 +1,35 @@
+name: Restore Labels
+
+on:
+  workflow_dispatch:
+
+jobs:
+  restore-labels:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.x
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install requests
+
+      - name: Restore Labels
+        run: |
+          python .github/scripts/restore_labels.py
+        env:
+          GH_PAT: ${{ secrets.SYNC_LABELS2 }}
+        working-directory: ${{ github.workspace }}
+
+      - name: Upload issue events as artifact
+        uses: actions/upload-artifact@v2
+        with:
+          name: issue-events
+          path: issue_events.json