[css-fonts-5] use section autolinks correctly

Author: svgeesus

css-fonts-5/Overview.bs

@@ -373,9 +373,8 @@ Then each component value is parsed according to this grammar:
 	= [color-COLRv0 | color-COLRv1 | color-SVG | color-sbix | color-CBDT ]</pre>
 
 If a component value is parsed correctly
-and is of a <a href="#font-format-definitions">font format</a> or
-<a href="#font-technology-definitions">font technology</a>
-that the UA supports,
+and is a supported [[css-fonts-4#font-format-definitions]] or
+[[css-fonts-4#font-technology-definitions]],
 add it to the list of supported sources.
 If parsing a component value results in a parsing error
 or its format or technology are unsupported,