chore(python): Bump sphinx-toolbox from 3.7.0 to 3.8.1 in /py-polars (#…

…19573)

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py-polars/docs/requirements-docs.txt

@@ -14,6 +14,6 @@ sphinx-copybutton==0.5.2
 sphinx-design==0.6.0
 sphinx-favicon==1.0.1
 sphinx-reredirects==0.1.4
-sphinx-toolbox==3.7.0
+sphinx-toolbox==3.8.1
 
 livereload==2.7.0