Revert "Bump pillow from 8.1.0 to 9.0.1 in /Knowage-Python (#541)"

This reverts commit ae143f88.

Revert "Bump pillow from 8.1.0 to 9.0.1 in /Knowage-Python (#541)"
This reverts commit ae143f88.
4de89161 · Marco Libanori · 673fb63a · 4de89161
Commit 4de89161 authored Jun 14, 2022 by Marco Libanori
--- a/Knowage-Python/requirements.txt
+++ b/Knowage-Python/requirements.txt
@@ -38,7 +38,7 @@ numpy==1.21.4
 packaging==19.2
 pandas==1.3.4
 patsy==0.5.1
-Pillow==9.0.1
+Pillow==8.1.0
 pip==20.0.1
 pkginfo==1.5.0.1
 plotly==4.2.1