Revert "Add Sphinx 9.1.0"

This reverts commit a31a4c2d2d818030a2f2513d18361ef1e2be72b7.

ReadTheDocs will not work with this version:

    python -m pip install -r https://gitlab.isc.org/isc-projects/bind9/-/raw/main/doc/arm/requirements.txt
    ERROR: Ignored the following yanked versions: 8.3.0
    ERROR: Ignored the following versions that require a different python version: 9.1.0 Requires-Python >=3.12; 9.1.0rc1 Requires-Python >=3.12; 9.1.0rc2 Requires-Python >=3.12
    ERROR: Could not find a version that satisfies the requirement Sphinx==9.1.0 (from versions: 0.1.61611, ..., 9.0.4)
    ERROR: No matching distribution found for Sphinx==9.1.0

diff --git a/doc/arm/requirements.txt b/doc/arm/requirements.txt
index 811c3d9493e6e387f6e8d95d5a854328053b258c..8d9d05ffb017ba98cfe8b6c5c699f869a5936eac 100644 (file)
--- a/doc/arm/requirements.txt
+++ b/doc/arm/requirements.txt
@@ -1,3 +1,3 @@
-Sphinx==9.1.0
+Sphinx==9.0.4
 docutils==0.22.4
 sphinx_rtd_theme==3.1.0