PDF Viewer update: Add missing margin between icon and title.

Fixed: 1128156
Change-Id: I877090bafdab7708e98747e3375e65d22314823b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2411564
Commit-Queue: John Lee <johntlee@chromium.org>
Auto-Submit: dpapad <dpapad@chromium.org>
Reviewed-by: John Lee <johntlee@chromium.org>
Cr-Commit-Position: refs/heads/master@{#807639}

chrome/browser/resources/pdf/elements/viewer-pdf-toolbar-new.html

@@ -22,6 +22,7 @@
   #title {
     font-size: 0.87rem;
     font-weight: 500;
+    margin-inline-start: 16px;
     overflow: hidden;
     text-overflow: ellipsis;
     white-space: nowrap;