revert dependabot sphinx change as it is too recent for RTD

diff --git a/doc/requirements.txt b/doc/requirements.txt
index 4e4900a27c0e1a7705d36cf70df58fddf64ed221..b5173984d2d896f9b872cdb38e704f70e02e5ea9 100644 (file)
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -1,3 +1,3 @@
-sphinx==7.1.0
+sphinx==4.3.2
 sphinx_rtd_theme==1.2.2
 readthedocs-sphinx-search==0.3.1