[css-inline-3] Mention renaming issue for 'initial-letters'.

Author: fantasai

css-inline-3/Overview.bs

@@ -442,6 +442,9 @@ Creating Initial Letters: the 'initial-letters' property</h3>
 	Computed value: as specified
 	</pre>
 
+	ISSUE: Renaming this property (and the others in this section)
+	is currently <a href="https://github.com/w3c/csswg-drafts/issues/2950">under discussion</a>.
+
 	This property specifies styling for dropped, raised, and sunken initial letters.
 	It takes the following values: