Set up the update authors job

.github/workflows/update-authors.yml

@@ -0,0 +1,41 @@
+name: Update authors
+
+on:
+  schedule:
+    - cron: '0 0 * * *'
+  workflow_dispatch:
+
+jobs:
+  auto-update:
+    name: Update authors
+    if: ${{ github.repository == 'vacanza/python-holidays' }}
+    permissions:
+      contents: write
+      pull-requests: write
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 100
+
+      - uses: actions/[email protected]
+        with:
+          python-version: '3.11'
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install gitpython
+
+      - run: scripts/update_authors.py
+
+      - uses: peter-evans/[email protected]
+        with:
+          base: dev
+          body: Update AUTHORS file contents.
+          branch: update-authors
+          commit-message: 'chore: Update authors'
+          committer: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
+          delete-branch: true
+          title: Update authors
+          token: ${{ github.token }}