build: Downgrade sphinx-reredirects to an older version again and pin notfound-page dep

Signed-off-by: Joas Schilling <coding@schilljs.com>

Author: nickvergessen

requirements.txt

@@ -27,11 +27,11 @@ sphinxcontrib-htmlhelp==2.1.0
 sphinxcontrib-jquery==4.1
 sphinxcontrib-jsmath==1.0.1
 sphinxcontrib-mermaid==1.2.3
-sphinx-notfound-page
+sphinx-notfound-page==1.1.0
 sphinxcontrib-phpdomain==0.13.2
 sphinxcontrib-qthelp==2.0.0
 sphinxcontrib-serializinghtml==2.0.0
 sphinx-toolbox==4.1.1
-sphinx-reredirects==1.1.0 
+sphinx-reredirects==0.1.6
 urllib3==2.6.2
 zipp==3.23.0