Temprarily pin jinja for building docs

fao89 · fao89 · commit 64b0bef37b35 · 2022-03-25T16:28:14.000Z
[noissue] (cherry picked from commit f9b50fc)
diff --git a/doc_requirements.txt b/doc_requirements.txt
@@ -5,3 +5,4 @@ sphinx-rtd-theme
 sphinxcontrib-openapi
 towncrier
 mistune<2.0.0
+Jinja2<3.1
