Synchronize Sphinx package version on ReadTheDocs with our CI

Related: isc-projects/images!228

diff --git a/doc/arm/requirements.txt b/doc/arm/requirements.txt
index 31c4a447598e942ea60af135a4dc1e98622c6908..3b12ea86fbd83fdbdcbfbd768209dc0c405be700 100644 (file)
--- a/doc/arm/requirements.txt
+++ b/doc/arm/requirements.txt
@@ -1,5 +1,5 @@
 # Make Read the Docs use the exact same package versions as in
 # registry.gitlab.isc.org/isc-projects/images/bind9:debian-bullseye-amd64
-Sphinx==5.3.0
-docutils==0.17.1
-sphinx_rtd_theme==1.0.0
+Sphinx==6.1.3
+docutils==0.18.1
+sphinx_rtd_theme==1.2.0