fix python docs ci (#20903)

diff --git a/docs/python_docs/requirements b/docs/python_docs/requirements
index 84b569c..79c940b 100644
--- a/docs/python_docs/requirements
+++ b/docs/python_docs/requirements
@@ -17,7 +17,7 @@
 
 numpy>=1.17,<1.20.0
 jupyter
-Jinja2==2.11.3
+Jinja2==3.0.3
 sphinx==2.4.0
 matplotlib
 notebook