Add missed language content

Author: lunny

options/locale/locale_en-US.ini

@@ -1637,6 +1637,7 @@ issues.pr.conflicted = Merge conflicts
 issues.pr.not_exist_issue = Reference issue does not exist.
 issues.branch.latest = Latest commit %s
 issues.link.created = Created %s
+issues.create_branch_from_issue_error_is_pull = Issue links cannot be created with pull request
 issues.num_participants = %d Participants
 issues.attachment.open_tab = `Click to see "%s" in a new tab`
 issues.attachment.download = `Click to download "%s"`