Backport PR #48989 on branch 1.5.x (CI: Pin pydata sphinx theme) (#48993)

Backport PR #48989: CI: Pin pydata sphinx theme

Co-authored-by: Patrick Hoefler <[email protected]>

Author: meeseeksmachine

environment.yml

@@ -99,7 +99,7 @@ dependencies:
   - natsort  # DataFrame.sort_values doctest
   - numpydoc
   - pandas-dev-flaker=0.5.0
-  - pydata-sphinx-theme
+  - pydata-sphinx-theme<0.11
   - pytest-cython  # doctest
   - sphinx
   - sphinx-panels

requirements-dev.txt

@@ -76,7 +76,7 @@ gitdb
 natsort
 numpydoc
 pandas-dev-flaker==0.5.0
-pydata-sphinx-theme
+pydata-sphinx-theme<0.11
 pytest-cython
 sphinx
 sphinx-panels