change doc action to install regular skfmm

.github/workflows/documenation.yml

@@ -14,9 +14,8 @@ jobs:
       - name: Install dependencies
         run: |
           sudo apt-get install -y pandoc
-          pip install sphinx sphinx_rtd_theme myst_parser furo nbsphinx 
+          pip install sphinx sphinx_rtd_theme myst_parser furo nbsphinx scikit-fmm
           pip install -r requirements.txt
-          pip install git+https://github.com/scikit-fmm/scikit-fmm.git@meson
       - name: Sphinx build
         run: |
           sphinx-build -E doc _build