fix(gatsby): correct args type in createParentChildLink (#32139)

we don't have the child node when calling this method, and we only need `id` from the child node.

Author: alvis

packages/gatsby/index.d.ts

@@ -1105,7 +1105,7 @@ export interface Actions {
 
   /** @see https://www.gatsbyjs.org/docs/actions/#createParentChildLink */
   createParentChildLink(
-    args: { parent: Node; child: Node },
+    args: { parent: Node; child: NodeInput },
     plugin?: ActionPlugin
   ): void