Switch to sphinx theme

Author: benjeffery

docs/_config.yml

@@ -42,7 +42,7 @@ sphinx:
     #- sphinxcontrib.prettyspecialmethods
 
     config:
-      html_theme: tskit_book_theme
+      html_theme: sphinx_book_theme
       html_theme_options:
         pygment_light_style: monokai
         pygment_dark_style: monokai

python/requirements/CI-docs/requirements.txt

@@ -6,4 +6,4 @@ sphinx-argparse==0.4.0
 numpy==1.25.1
 svgwrite==1.4.3
 msprime==1.2.0
-tskit-book-theme
+sphinx-book-theme

python/requirements/development.txt

@@ -35,7 +35,7 @@ sphinx-issues
 sphinx-jupyterbook-latex
 sphinxcontrib-prettyspecialmethods
 tqdm
-tskit-book-theme
+sphinx-book-theme
 tszip
 pydata_sphinx_theme>=0.7.2
 svgwrite>=1.1.10