To resolve the version select and search issue on readthedocs.org,
sphinx_rtd_theme>=1.2.1 is required.
Related https://github.com/readthedocs/sphinx_rtd_theme/issues/1452
(cherry picked from commit
92143fa9607b6163329b111ea1484b5638a6f977)
# Make Read the Docs use the exact same package versions as in
# registry.gitlab.isc.org/isc-projects/images/bind9:debian-bookworm-amd64
-Sphinx==6.1.3
+Sphinx==6.2.1
docutils==0.18.1
-sphinx_rtd_theme==1.2.0
+sphinx_rtd_theme==1.2.2