[unified-consent] Add bottom space to passphrase settings

Bug: 872673
Change-Id: I7c304ab27f8fe2d4539be3ff99b962aefb392f89
Reviewed-on: https://chromium-review.googlesource.com/c/1333756Reviewed-by: Scott Chen <scottchen@chromium.org>
Commit-Queue: Thomas Tangl <tangltom@chromium.org>
Cr-Commit-Position: refs/heads/master@{#607758}

chrome/browser/resources/settings/people_page/sync_page.html

@@ -67,6 +67,10 @@
         border-top: var(--settings-separator-line);
       }
 
+      #other-sync-items {
+        padding-bottom: 8px;
+      }
+
       #other-sync-items > .list-item {
         border-top: var(--settings-separator-line);
       }