fix: update component-custom-events.md (#717)

Match sample text in description and HTML example

Author: tobiaskapser

src/guide/component-custom-events.md

@@ -152,7 +152,7 @@ Let's create an example custom modifier, `capitalize`, that capitalizes the firs
 
 Modifiers added to a component `v-model` will be provided to the component via the `modelModifiers` prop. In the below example, we have created a component that contains a `modelModifiers` prop that defaults to an empty object.
 
-Notice that when the component's `created` lifecycle hook triggers, the `modelModifiers` prop contains `capitalize` and its value is `true` - due to it being set on the `v-model` binding `v-model.capitalize="bar"`.
+Notice that when the component's `created` lifecycle hook triggers, the `modelModifiers` prop contains `capitalize` and its value is `true` - due to it being set on the `v-model` binding `v-model.capitalize="myText"`.
 
 ```html
 <my-component v-model.capitalize="myText"></my-component>