[css-values-3][css-values-4] Mark as note

Author: fantasai

css-values-3/Overview.bs

@@ -1723,7 +1723,7 @@ Functional Notations</h2>
 	Functions can take multiple arguments,
 	which are formatted similarly to a CSS property value.
 
-	Some legacy <a>functional notations</a>, such as ''rgba()'', use commas unnecessarily,
+	Note: Some legacy <a>functional notations</a>, such as ''rgba()'', use commas unnecessarily,
 	but generally commas are only used to separate items in a list,
 	or pieces of a grammar that would be ambiguous otherwise.
 	If a comma is used to separate arguments,

css-values-4/Overview.bs

@@ -2790,7 +2790,7 @@ Functional Notations</h2>
 	Functions can take multiple arguments,
 	which are formatted similarly to a CSS property value.
 
-	Some legacy <a>functional notations</a>, such as ''rgba()'', use commas unnecessarily,
+	Note: Some legacy <a>functional notations</a>, such as ''rgba()'', use commas unnecessarily,
 	but generally commas are only used to separate items in a list,
 	or pieces of a grammar that would be ambiguous otherwise.
 	If a comma is used to separate arguments,