Gecko sync update

Author: moz-wptsync-bot

svg/painting/reftests/META.yml

@@ -45,3 +45,8 @@ links:
   results:
   - test: paint-order-text-decorations.svg
   url: https://bugzilla.mozilla.org/show_bug.cgi?id=1983860
+- product: firefox
+  results:
+  - test: text-shadow-01.html
+  - test: text-shadow-02.html
+  url: https://bugzilla.mozilla.org/show_bug.cgi?id=1986796