Fix "Go to the docs" link.

Signed-off-by: Francis Laniel <[email protected]>

content/_index.md

@@ -39,6 +39,6 @@ features:
     feature_matrix:
       data: gadgets
       title: The Gadgets
-      learn_more_link: https://www.inspektor-gadget.io/docs/latest/gadgets/
+      learn_more_link: https://www.inspektor-gadget.io/docs/latest/builtin-gadgets/
       description: Find information about all the Inspektor Gadget gadgets organized into their corrosponding categories
 ---