Revert "Bump lxml from 4.4.2 to 4.6.5 in /Knowage-Python (#543)"

This reverts commit 5ee1786f.

Revert "Bump lxml from 4.4.2 to 4.6.5 in /Knowage-Python (#543)"
This reverts commit 5ee1786f.
e79d688b · Marco Libanori · b8eff6e7 · e79d688b
Commit e79d688b authored Jun 14, 2022 by Marco Libanori
--- a/Knowage-Python/requirements.txt
+++ b/Knowage-Python/requirements.txt
@@ -29,7 +29,7 @@ Jinja2==2.10.3
 joblib==0.14.0
 keyring==19.3.0
 kiwisolver==1.1.0
-lxml==4.6.5
+lxml==4.4.2
 MarkupSafe==1.1.1
 matplotlib==3.1.1
 mod-wsgi==4.7.1