Removed invalid form tag (#14391) (#14395)

introduced by #5073

Co-authored-by: KN4CK3R <KN4CK3R@users.noreply.github.com>

templates/repo/issue/view_content/sidebar.tmpl

@@ -518,7 +518,6 @@
 			{{ if and .IsRepoAdmin (not .Repository.IsArchived) }}
 			<div class="ui divider"></div>
 			<div class="ui watching">
-				<div>
 				<button class="fluid ui show-modal button {{if .Issue.IsLocked }} negative {{ end }}" data-modal="#lock">
 					{{if .Issue.IsLocked}}
 						{{svg "octicon-key"}}
@@ -528,8 +527,6 @@
 						{{.i18n.Tr "repo.issues.lock"}}
 					{{end}}
 				</button>
-					</form>
-				</div>
 			</div>