Print Management: Add missing closing div

- It was accidentally deleted here [1]

[1] - https://chromium-review.googlesource.com/c/chromium/src/+/2224346/24/chromeos/components/print_management/resources/print_management.html

Bug: None
Test: None
Change-Id: Ifeed774ca437c29bc38582ce4e5c18ac71619efd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2402287Reviewed-by: Jimmy Gong <jimmyxgong@chromium.org>
Commit-Queue: Zentaro Kavanagh <zentaro@chromium.org>
Cr-Commit-Position: refs/heads/master@{#805589}

chromeos/components/print_management/resources/print_management.html

@@ -159,3 +159,4 @@
       </template>
     </iron-list>
   </template>
+</div>