Use correct requirements when building docs

Author: finsberg

.github/workflows/build_docs.yml

@@ -33,7 +33,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Install dependencies
-        run: python3 -m pip install -r requirements.txt
+        run: python3 -m pip install -r requirements-docs.txt
 
       - name: Build docs
         run: jupyter book build .