fix build : update JInja2

faithandbrave · faithandbrave · commit af559089d039 · 2022-02-23T13:14:28.000+09:00
diff --git a/docker/requirements.txt b/docker/requirements.txt
@@ -2,7 +2,7 @@ flake8==3.7.9
 flake8-import-order==0.18.1
 hacking==2.0.0
 htmlmin==0.1.12
-Jinja2==2.11.1
+Jinja2==3.0.3
 Markdown==3.2.1
 Pygments==2.5.2
 regex==2020.2.20
