[gbrainy] Update Catalan translation

[Jordi Mas <jmas src gnome org>]

commit 1c66b23f8837ac5d2be69627582843f699f59d27
Author: Jordi Mas <jmas softcatala org>
Date:   Thu Aug 1 20:00:03 2019 +0200

    Update Catalan translation

 help/ca/ca.po | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/help/ca/ca.po b/help/ca/ca.po
index 09b14f0c..eacefc37 100644
--- a/help/ca/ca.po
+++ b/help/ca/ca.po
@@ -606,7 +606,7 @@ msgstr "Fàcil"
 #. (itstool) path: td/p
 #: C/score.page:35
 msgid "Medium"
-msgstr "Mestre"
+msgstr "Mitjà"
 
 #. (itstool) path: td/p
 #: C/score.page:36