[css-color-4] linkfix

Author: svgeesus

css-color-4/Overview.bs

@@ -4353,7 +4353,7 @@ Accessibility Considerations {#a11y-sec}
 This specification <a href="#notes">encourages authors to not use
 	color alone</a> as a distinguishing feature.
 
-This specification <a href="css-system-colors">encourages browsers to ensure
+This specification <a href="#css-system-colors">encourages browsers to ensure
 	adequate contrast for specific system color foreground/background pairs</a>.
 	A harder requirement with specific AA or AAA contrast ratios was considered,
 	but since browsers are often just passing along color choices made by the OS,