Update mpl-sphinx-theme in environment.yml

mpl-sphinx-theme now also pins pydata-sphinx-theme so that we can remove the explicit dependency there.

Author: timhoffm

environment.yml

@@ -37,7 +37,6 @@ dependencies:
   - ipywidgets
   - numpydoc>=1.0
   - packaging>=20
-  - pydata-sphinx-theme~=0.15.0
   - pyyaml
   - sphinx>=3.0.0,!=6.1.2
   - sphinx-copybutton
@@ -48,7 +47,7 @@ dependencies:
   - pystemmer
   - pip
   - pip:
-      - mpl-sphinx-theme~=3.8.0
+      - mpl-sphinx-theme~=3.10.0
       - sphinxcontrib-svg2pdfconverter>=1.1.0
       - sphinxcontrib-video>=0.2.1
       - pikepdf