[calls] metainfo: Fix typo

[Evangelos Ribeiro Tzaras <devrtz src gnome org>]

commit 3778f6dea3c6ce170f1269bc0f38008102cf607b
Author: Evangelos Ribeiro Tzaras <devrtz fortysixandtwo eu>
Date:   Fri Jul 16 19:15:00 2021 +0200

    metainfo: Fix typo
    
    A good reason to validate the metadata in CI.

 data/org.gnome.Calls.metainfo.xml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/data/org.gnome.Calls.metainfo.xml b/data/org.gnome.Calls.metainfo.xml
index 231b9534..429d6df5 100644
--- a/data/org.gnome.Calls.metainfo.xml
+++ b/data/org.gnome.Calls.metainfo.xml
@@ -69,7 +69,7 @@
     </content_rating>
 
     <releases>
-      <release version="41.alpha" data="2021-07-16">
+      <release version="41.alpha" date="2021-07-16">
         <description>First GNOME release</description>
       </release>
     </releases>