Grammar change ("several hundred") (#570)

Quite minor grammar change ("several hundreds of" -> "several hundred") but for me it really took the flow away from my reading of the article.
Looking this up it appears the consensous is the latter is better hence the PR!

Author: Retne

src/guide/composition-api-introduction.md

@@ -8,7 +8,7 @@ Reaching this far in the documentation, you should already be familiar with both
 
 <VideoLesson href="https://www.vuemastery.com/courses/vue-3-essentials/why-the-composition-api" title="Learn how Composition API works in depth with Vue Mastery">Watch a free video about the Composition API on Vue Mastery</VideoLesson>
 
-Creating Vue components allows us to extract repeatable parts of the interface coupled with its functionality into reusable pieces of code. This alone can get our application pretty far in terms of maintainability and flexibility. However, our collective experience has proved that this alone might not be enough, especially when your application is getting really big – think several hundreds of components. When dealing with such large applications, sharing and reusing code becomes especially important.
+Creating Vue components allows us to extract repeatable parts of the interface coupled with its functionality into reusable pieces of code. This alone can get our application pretty far in terms of maintainability and flexibility. However, our collective experience has proved that this alone might not be enough, especially when your application is getting really big – think several hundred components. When dealing with such large applications, sharing and reusing code becomes especially important.
 
 Let’s imagine that in our app, we have a view to show a list of repositories of a certain user. On top of that, we want to apply search and filter capabilities. Our component handling this view could look like this: