update docs build

.github/workflows/docs-build.yml

@@ -18,7 +18,7 @@ jobs:
             - name: Install dependencies
               run: |
                   pip install --no-cache-dir Cython
-                  pip install -r requirements.txt -r requirements_dev.txt
+                  pip install -r requirements_dev.txt
                   pip install .
             # - name: Discover typos with codespell
             #   run: codespell --skip="*.csv,*.geojson,*.json,*.js,*.html,*cff,*.pdf,./.git" --ignore-words-list="aci,acount,hist"