fixed syntax error

Author: Renaud11232

.github/workflows/build.yml

@@ -31,7 +31,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-        uses: actions/setup-python@v5
+      - uses: actions/setup-python@v5
         with:
           python-version: 3.9
       - name: Install Sphinx & Dependencies