Gecko sync update

Author: moz-wptsync-bot

svg/styling/META.yml

@@ -270,3 +270,8 @@ links:
   - subtest: Property "glyph-orientation-vertical" is supported
     test: required-properties.svg
   url: https://bugzilla.mozilla.org/show_bug.cgi?id=1993657
+- product: firefox
+  results:
+  - test: css-var-on-length-attributes-02.svg
+  - test: css-var-on-length-attributes-04.svg
+  url: https://bugzilla.mozilla.org/show_bug.cgi?id=2003550