Update pythonpackage.yml

Add rtree-linux to action

.github/workflows/pythonpackage.yml

@@ -19,7 +19,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install numpy meshcat anytree trimesh[easy]
+        pip install numpy meshcat anytree rtree-linux trimesh[easy]
     - name: Test with pytest
       run: |
         pip install pytest pytest-benchmark