Fix typo

Author: Eli

.github/workflows/build_sphinx.yml

@@ -24,7 +24,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-      - uses: actions/checkout@v4
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Set up micromamba (conda-forge + optional org channel)