docs: pin sphinx dependency to versions <7.0.0
This commit pins sphinx to versions lower than 7.0.0 to resolve
incompatibilities with older versions of sphinx-rtd-theme.
Change-Id: Iddef62f8a80120cc457c616e8bd737cce3e1f1a1
Signed-off-by: Harrison Mutai <harrison.mutai@arm.com>
diff --git a/docs/requirements.txt b/docs/requirements.txt
index 358ed0e..4a22701 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,3 +1,3 @@
-sphinx>=2.0.0
+sphinx >=6.2.0, <7.0.0
sphinx-rtd-theme>=0.4.3
sphinxcontrib-plantuml>=0.15