[css-color-4][editorial] linkable note

Author: svgeesus

css-color-4/Overview.bs

@@ -2123,7 +2123,8 @@ The ''<color>/currentcolor'' keyword</h3>
 		but red over the text "really".
 	</div>
 
-	Note: Multi-word keywords in CSS usually separate their component words with hyphens.
+	<p class="note" id="trivia" role="note"><span class="marker">Note:</span>
+	Multi-word keywords in CSS usually separate their component words with hyphens.
 	''<color>/currentcolor'' doesn't, because (deep breath)
 	it was originally introduced in SVG
 	as a property value, "current-color" with the usual CSS spelling.
@@ -2143,6 +2144,8 @@ The ''<color>/currentcolor'' keyword</h3>
 	at which point the capitalization stopped mattering,
 	as CSS keywords are <a href="https://infra.spec.whatwg.org/#ascii-case-insensitive">ASCII case-insensitive</a>.
 
+	</p>
+
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