Fix docs build - Update .readthedocs.yml (#1774)

Signed-off-by: SACHIDANAND ALLE <[email protected]>

Author: SachidanandAlle

.readthedocs.yml

@@ -20,7 +20,7 @@ version: 2
 build:
   os: ubuntu-22.04
   tools:
-    python: "3.8"
+    python: "3.9"
 
 # Build documentation in the docs/ directory with Sphinx
 sphinx: