Update css-scrollbar.json (#6957)

In Chrome 121.0.0 onwards, the webkit-way of styling scrollbars is gone, and instead, the standarized scrollbar-color and scrollbar-width are supported. See https://chromestatus.com/feature/5665308343795712 for more

Author: HM100

features-json/css-scrollbar.json

@@ -96,7 +96,7 @@
       "118":"a x #2",
       "119":"a x #2",
       "120":"a x #2",
-      "121":"a x #2"
+      "121":"y"
     },
     "firefox":{
       "2":"n",
@@ -343,10 +343,10 @@
       "118":"a x #2",
       "119":"a x #2",
       "120":"a x #2",
-      "121":"a x #2",
-      "122":"a x #2",
-      "123":"a x #2",
-      "124":"a x #2"
+      "121":"y",
+      "122":"y",
+      "123":"y",
+      "124":"y"
     },
     "safari":{
       "3.1":"u",