Update localization/en_GB.inc

Co-authored-by: Fawzi Essam <[email protected]>

Author: GermanCoding

localization/en_GB.inc

@@ -1,5 +1,5 @@
 <?php
 $labels = array();
-$labels['internal'] = 'Mail was internal';
+$labels['internal'] = 'Internal email';
 $labels['unencrypted'] = 'Message received over an unencrypted connection!';
 ?>