docs: fix "a accessor" → "an accessor" grammar typo

packages/solid/README.md

@@ -104,7 +104,7 @@ import { createSignal } from "solid-js";
 
 // A component is just a function that (optionally) accepts properties and returns a DOM node
 const Counter = props => {
-  // Create a piece of reactive state, giving us a accessor, count(), and a setter, setCount()
+  // Create a piece of reactive state, giving us an accessor, count(), and a setter, setCount()
   const [count, setCount] = createSignal(props.startingCount || 1);
 
   // The increment function calls the setter

packages/solid/src/reactive/signal.ts

@@ -1226,7 +1226,7 @@ export type ChildrenReturn = Accessor<ResolvedChildren> & { toArray: () => Resol
  * Resolves child elements to help interact with children
  *
  * @param fn an accessor for the children
- * @returns a accessor of the same children, but resolved
+ * @returns an accessor of the same children, but resolved
  *
  * @description https://docs.solidjs.com/reference/component-apis/children
  */