Fix typo in reference to Ahem.ttf in WPT size-adjust-unicode-range-system-fallback.html and its reference.

Differential Revision: https://phabricator.services.mozilla.com/D191471

bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1860143
gecko-commit: 782e7c9148e512e0937f1316a939ad773671ff3e
gecko-reviewers: TYLin
diff --git a/css/css-fonts/size-adjust-unicode-range-system-fallback-ref.html b/css/css-fonts/size-adjust-unicode-range-system-fallback-ref.html
index 46586c6..c14d922 100644
--- a/css/css-fonts/size-adjust-unicode-range-system-fallback-ref.html
+++ b/css/css-fonts/size-adjust-unicode-range-system-fallback-ref.html
@@ -5,7 +5,7 @@
 <style>
 @font-face {
   font-family: large-font;
-  src: local(Ahem), url(/fonts/ahem.ttf);
+  src: local(Ahem), url(/fonts/Ahem.ttf);
   size-adjust: 1000%;
   unicode-range: U+0020;
 }
diff --git a/css/css-fonts/size-adjust-unicode-range-system-fallback.html b/css/css-fonts/size-adjust-unicode-range-system-fallback.html
index 9e1a65d..6cfc23f 100644
--- a/css/css-fonts/size-adjust-unicode-range-system-fallback.html
+++ b/css/css-fonts/size-adjust-unicode-range-system-fallback.html
@@ -8,7 +8,7 @@
 <style>
 @font-face {
   font-family: large-font;
-  src: local(Ahem), url(/fonts/ahem.ttf);
+  src: local(Ahem), url(/fonts/Ahem.ttf);
   size-adjust: 1000%;
   unicode-range: U+0020;
 }