Do not allow RobotoMono-Regular to stand in for Roboto

Reported-by: Robert Sesek <rsesek@chromium.org>
Bug: Issue 11831
Change-Id: I04715f0ed9dfc0b32a43519b23451584aa385b64
(cherry picked from commit 0311e3417dac976370655524cf9b1434ba670799)
diff --git a/polygerrit-ui/app/styles/fonts.css b/polygerrit-ui/app/styles/fonts.css
index 41aec27..c837492 100644
--- a/polygerrit-ui/app/styles/fonts.css
+++ b/polygerrit-ui/app/styles/fonts.css
@@ -34,7 +34,7 @@
   font-family: 'Roboto';
   font-style: normal;
   font-weight: 400;
-  src: local('Roboto'), local('RobotoMono-Regular'),
+  src: local('Roboto'), local('Roboto-Regular'),
        url('../fonts/Roboto-Regular.woff2') format('woff2'),
        url('../fonts/Roboto-Regular.woff') format('woff');
   unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2212, U+2215, U+E0FF, U+EFFD, U+F000;