[css-color-adjust-1][editorial] Fixed Bikeshed error

Author: SebastianZ

css-color-adjust-1/Overview.bs

@@ -826,7 +826,7 @@ Emulation {#color-adjust-emulation}
 	For the purposes of user agent automation and application testing, this document
 	defines the below emulations.
 
-	<dfn export>Emulate Forced Colors Mode</dfn> {#emulate-forced-colors-mode}
+	Emulate Forced Colors Mode {#emulate-forced-colors-mode}
 	--------------------------------------------
 
 	Each [=top-level traversable=] has an associated