add missing link

Author: martrapp

src/content/docs/tips/css.mdx

@@ -76,7 +76,7 @@ A promising approach with components might be the following (still under evaluat
 </script>
 ```
 
-This way, the styling will even work if the component is used several times on the same page. Automatic name assignment for same-document view transitions is easy with [auto-generated names]() 
+This way, the styling will even work if the component is used several times on the same page. Automatic name assignment for same-document view transitions is easy with [auto-generated names](#auto-generated-view-transition-names) and for cross-document view transitions it
 
 is ease with the [declarative-names script](/tools/utensil-drawer/#declarative-names). For the example above set `data-vtbag-decl=".some-CSS-class-name = some-id-"`