update permissions on deploy docs action

.github/workflows/deploy-docs.yaml

@@ -0,0 +1,41 @@
+name: deploy-docs
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - docs/**
+      - .github/workflows/deploy-docs.yaml
+
+jobs:
+  deploy-docs:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    defaults:
+      run:
+        shell: bash -el {0}
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: conda-incubator/setup-miniconda@v3
+        with:
+          auto-update-conda: true
+          python-version: "3.12"
+
+      - name: Install package
+        run: |
+          conda install -c conda-forge osmnx
+          pip install ".[dev]"
+
+      - name: Build book
+        run: |
+          jupyter-book build docs/
+
+      # Push the book's HTML to github-pages
+      - name: GitHub Pages action
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./docs/_build/html