[gnome-calculator] Update Catalan translation

[Jordi Mas <jmas src gnome org>]

commit 9e91f9a0cfbefa933a500f00953463cf93d06a37
Author: Jordi Mas <jmas softcatala org>
Date:   Thu Jan 21 22:23:58 2021 +0100

    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 36d29a51..6b9f94b6 100644
--- a/help/ca/ca.po
+++ b/help/ca/ca.po
@@ -1548,7 +1548,7 @@ msgid ""
 "To enter superscript numbers use <keyseq><key>Ctrl</key>number</keyseq>, for"
 " subscript numbers use <keyseq><key>Alt</key>number</keyseq>."
 msgstr ""
-"Per introduir nombres de superíndex utilitzeu <keyseq><key>"
+"Per a introduir nombres de superíndex utilitzeu <keyseq><key>"
 "Ctrl</key>nombre</keyseq>, per als nombres de subíndex utilitzeu "
 "<keyseq><key>Alt</key>nombre</keyseq>."