[damned-lies] Refs #236 - Add libxml2-python3 dep for gimp-help xml2po

[Claude Paroz <claudep src gnome org>]

commit c4dd5e9c73910eb4c2cec24421f76011b95a89a8
Author: Claude Paroz <claude 2xlibre net>
Date:   Tue Jun 8 08:21:34 2021 +0200

    Refs #236 - Add libxml2-python3 dep for gimp-help xml2po

 requirements.txt | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/requirements.txt b/requirements.txt
index 083ba848..39c494cf 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,6 +3,7 @@ mysqlclient  # MySQL database connector
 pillow  # Hackergotchi check
 markdown==3.2.2  # Team presentation markup rendering
 pyicu==2.3.1  # Correct sorting in various languages. 2.4.2 fails to compile on some platforms
+libxml2-python3  # For the gimp-help xml2po tool
 translate-toolkit>=2.2.0
 
 # Debug tools