[CI] leaderboard formatting (#58)

.github/workflows/update_leaderboard.yml

@@ -0,0 +1,28 @@
+name: Format leaderboard
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'leaderboards/data_AlpacaEval/**'
+
+jobs:
+  format_leaderboard:
+    runs-on: "ubuntu-20.04"
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: 3.10
+          cache: "pip"
+
+      - name: Install dependencies
+        run: pip install .
+
+      - name: Run script
+        run: python docs/format_export_leaderboards.py