docs: change sphinx HTML theme to furo

Change-Id: Ia51285eadc19beeb051ce102502544e85442cb9c
diff --git a/docs/requirements.txt b/docs/requirements.txt
index 1348feb..cbb6e50 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,3 +1,4 @@
 docutils>=0.20
+furo==2024.8.6
 sphinx>=7.0.1,<9
 sphinxcontrib-doxylink~=1.13