doc(hansbug): use Jinja2~=3.0.0, ci skip

requirements-doc.txt

+Jinja2~=3.0.0
 sphinx~=3.2.0
 sphinx_rtd_theme~=0.4.3
 enum_tools
@@ -9,4 +10,4 @@ where~=1.0.2
 numpy>=1.19,<2
 easydict>=1.7,<2
 scikit-learn>=0.24.2
-potc-treevalue>=0.0.1
\ No newline at end of file
+potc-treevalue>=0.0.1