[css-text-decor] Enable cross-linking.

Author: fantasai

css-text-decor/Overview.bs

@@ -19,6 +19,7 @@ At Risk: The 'text-decoration-skip' property.
 At Risk: The line positioning rules.
 At Risk: The ability to place both emphasis marks and ruby on the same base text.
 Link Defaults: css-color-3 (property) color
+Use <i> Autolinks: yes
 </pre>