Fix links

Author: edemaine

src/routes/reference/reactive-utilities/batch.mdx

@@ -62,12 +62,12 @@ DOM updates, which can be expensive.
 Solid uses `batch` internally to automatically batch updates for you
 in a few cases:
 
-* Within [effects](/reference/basic-reactivity/effects)
+* Within [`createEffect`](/reference/basic-reactivity/create-effect)
   and [`onMount`](/reference/lifecycle/on-mount)
 * Within the [setter of a store](/reference/store-utilities/create-store#setter)
   (which can update several properties at once)
 * Within array methods (e.g. `Array.prototype.splice`) of a
-  [mutable store](/reference/store-utilities/create-mutable-store)
+  [mutable store](/reference/store-utilities/create-mutable)
   (which can update several elements at once)
 
 These save you from having to use `batch` yourself in many cases.