Diagnostics: Fix two digit number layout with Russian Localization

Fix the bug where the layout for the percentage goes to separate lines where it should have been in a single line.
Before: https://screenshot.googleplex.com/7PvRw7XXfTDXGMA
After: https://screenshot.googleplex.com/7agC4ZFDMaWodH5

Bug: b/216051123
Change-Id: Icbec53c1a7b6944f3e108b8becbb2d9df6176da2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3848941
Commit-Queue: Yuhan Yang <yyhyyh@google.com>
Reviewed-by: Michael Checo <michaelcheco@google.com>
Cr-Commit-Position: refs/heads/main@{#1038331}

ash/webui/diagnostics_ui/resources/realtime_cpu_chart.html

@@ -78,6 +78,7 @@
     display: inline-block;
     padding-inline-start: 8px;
     text-align: end;
+    white-space: nowrap;
     width: 25px;
   }