Fix milestone template (#10824)

Signed-off-by: jolheiser <john.olheiser@gmail.com>

templates/repo/issue/milestone_issues.tmpl

@@ -249,7 +249,7 @@
 										{{$.i18n.Tr (TrN $.i18n.Lang $rejectOfficial "repo.pulls.reject_count_1" "repo.pulls.reject_count_n") $rejectOfficial}}
 								{{end}}
 							{{end}}
-							{{if and (not .PullRequest.HasMerged) ((len .PullRequest.ConflictedFiles) gt 0)}}
+							{{if and (not .PullRequest.HasMerged) (gt (len .PullRequest.ConflictedFiles) 0)}}
 								<span class="conflicting">{{svg "octicon-mirror" 16}} {{$.i18n.Tr (TrN $.i18n.Lang (len .PullRequest.ConflictedFiles) "repo.pulls.num_conflicting_files_1" "repo.pulls.num_conflicting_files_n") (len .PullRequest.ConflictedFiles)}}</span>
 							{{end}}
 						{{end}}