templates/user/settings: fix delete email button (#4998)

templates/user/settings/email.tmpl

@@ -21,7 +21,7 @@
 									{{if not .IsPrimary}}
 										<div class="ui right">
 											<button class="ui red tiny basic button delete-button" data-url="{{$.Link}}/delete" data-id="{{.ID}}">
-												{{$.i18n.Tr "settings.delete_key"}}
+												{{$.i18n.Tr "settings.delete_email"}}
 											</button>
 										</div>
 										{{if .IsActivated}}