Use count() instead of signal() in api children example (#1227)

Author: vincentfretin

src/routes/reference/component-apis/children.mdx

@@ -33,7 +33,7 @@ If you instead call `resolved()`, you re-use the already resolved children.
 You also guarantee that the children are tracked in the current component, as opposed to another tracking scope such as another component.
 
 In addition, the `children` helper "resolves" children by calling argumentless functions and flattening arrays of arrays into an array. 
-For example, a child specified with JSX like `{signal() * 2}` gets wrapped into a getter function `() => count() * 2` in `props.children`, but gets evaluated to an actual number in resolved, properly depending on a count signal.
+For example, a child specified with JSX like `{count() * 2}` gets wrapped into a getter function `() => count() * 2` in `props.children`, but gets evaluated to an actual number in resolved, properly depending on a count signal.
 
 If the given `props.children` is not an array (which occurs when the JSX tag has a single child), then the `children` helper will not normalize it into an array. 
 This is useful behavior e.g. when the intention is to pass a single function as a child, which can be detected via `typeof resolved() === 'function'`.