[CI Doc builds] Pin sphinx version to <9 (#418)

urfeex · web-flow · commit 4db70eb4f348 · 2026-01-19T10:23:27.000+01:00
Using sphinx >=9 leads to issues with the sphinx-tabs extension (see executablebooks/sphinx-tabs#206) Until this is fixed upstream, sphinx will be pinned to version <9. This should fix our doc builds.
diff --git a/doc_requirements.txt b/doc_requirements.txt
@@ -1,4 +1,4 @@
-sphinx
+sphinx<9
 sphinx-copybutton
 sphinx-tabs
 sphinx_rtd_theme

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-sphinx`
	`1`	`+sphinx<9`
`2`	`2`	`sphinx-copybutton`
`3`	`3`	`sphinx-tabs`
`4`	`4`	`sphinx_rtd_theme`