fix case sensitive links (#2718)

The "Shared-Getters" and "Shared-Actions" links need to be capitalised to work - this is due to the markdown processor pinia uses giving them capitalised IDs.

packages/docs/cookbook/composing-stores.md

@@ -42,7 +42,7 @@ const useY = defineStore('y', () => {
 
 ## Nested Stores
 
-Note that if one store uses another store, you can directly import and call the `useStore()` function within _actions_ and _getters_. Then you can interact with the store just like you would from within a Vue component. See [Shared Getters](#shared-getters) and [Shared Actions](#shared-actions).
+Note that if one store uses another store, you can directly import and call the `useStore()` function within _actions_ and _getters_. Then you can interact with the store just like you would from within a Vue component. See [Shared Getters](#Shared-Getters) and [Shared Actions](#Shared-Actions).
 
 When it comes to _setup stores_, you can simply use one of the stores **at the top** of the store function: