Bug 1706308 Fix alignment of numbers on Import Summary Page. r=tgiles

Differential Revision: https://phabricator.services.mozilla.com/D114628

browser/components/aboutlogins/content/aboutLoginsImportReport.css

@@ -37,6 +37,7 @@
   display: flex;
   flex-direction: column;
   width: 120px;
+  height: 100px;
   align-items: center;
   margin: auto;
 }