requirements: use lxml <=4.7 for now

Newer lxml breaks us in some way, causing invalid html to be output

requirements: use lxml <=4.7 for now
Newer lxml breaks us in some way, causing invalid html to be output
504032b9 · Merlijn Wajer · 55a02ede · 504032b9
Commit 504032b9 authored Jan 20, 2022 by Merlijn Wajer
--- a/requirements.txt
+++ b/requirements.txt
-lxml
+lxml==4.6.5