fix yaml syntax (hopefully)

.github/workflows/deploy.yml

@@ -1,43 +1,37 @@
 name: deploy
 
 on:
-  # Trigger the workflow on push to main branch
   push:
     branches:
       - main
 
-# This job installs dependencies, build the book, and pushes it to `gh-pages`
 jobs:
   build-and-deploy-book:
     name: Build book
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+      - uses: actions/checkout@v3
 
-    - name: Additional info about the build
-      shell: bash
-      run: |
-        uname -a
-        df -h
-        ulimit -a
+      - name: Additional info about the build
+        shell: bash
+        run: |
+          uname -a
+          df -h
+          ulimit -a
 
-
-    # More info on options: https://github.com/conda-incubator/setup-miniconda
-    - uses: conda-incubator/setup-miniconda@v3
+      - uses: conda-incubator/setup-miniconda@v3
         with:
           activate-environment: biochemist-python
           environment-file: requirements.yaml
 
-    # Build the book
-    - name: Build the book
-      shell: bash -l {0}
-      run: |
-        jupyter-book build biochemist-python
+      - name: Build the book
+        shell: bash -l {0}
+        run: |
+          jupyter-book build biochemist-python
 
-    # Deploy the book's HTML to gh-pages branch
-    - name: GitHub Pages action
-      uses: peaceiris/[email protected]
-      with:
-        github_token: ${{ secrets.GITHUB_TOKEN }}
-        publish_dir: biochemist-python/_build/html
+      - name: GitHub Pages action
+        uses: peaceiris/[email protected]
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: biochemist-python/_build/html