revert dependabot sphinx change as it is too recent for RTD

rthalley · rthalley · commit 7e38fc4db7e2 · 2023-07-25T12:05:35.000-07:00
diff --git 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
