Docs: bump Sphinx to 8.0 and update constraints (#122496)

Co-authored-by: Adam Turner <[email protected]>

Author: hugovk

Doc/constraints.txt

@@ -9,16 +9,16 @@ babel<3
 colorama<0.5
 imagesize<1.5
 Jinja2<3.2
-packaging<24
-Pygments>=2.16.1,<3
+packaging<25
+Pygments<3
 requests<3
 snowballstemmer<3
-sphinxcontrib-applehelp<1.1
-sphinxcontrib-devhelp<1.1
-sphinxcontrib-htmlhelp<2.1
+sphinxcontrib-applehelp<2.1
+sphinxcontrib-devhelp<2.1
+sphinxcontrib-htmlhelp<2.2
 sphinxcontrib-jsmath<1.1
-sphinxcontrib-qthelp<1.1
-sphinxcontrib-serializinghtml<1.2
+sphinxcontrib-qthelp<2.1
+sphinxcontrib-serializinghtml<2.1
 
 # Direct dependencies of Jinja2 (Jinja is a dependency of Sphinx, see above)
 MarkupSafe<2.2

Doc/requirements.txt

@@ -6,7 +6,7 @@
 # Sphinx version is pinned so that new versions that introduce new warnings
 # won't suddenly cause build failures. Updating the version is fine as long
 # as no warnings are raised by doing so.
-sphinx~=7.4.0
+sphinx~=8.0.0
 
 blurb