Pin a working jinja2 version

see https://twitter.com/readthedocs/status/1507388916013314048

diff --git a/requirements.txt b/requirements.txt
index 5688fb38234d886609731d82cc0625d52b8fef9b..d4d16d8efb727477aabf93fc52212b7f1547fcec 100644 (file)
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,3 +4,4 @@ mkdocs-git-revision-date-plugin==0.3.1
 mkdocs-macros-plugin==0.6.0 
 mkdocs-material==7.3.4
 mkdocs==1.2.3
+jinja2<3.1.0