Update part11a.md

grammatical error
"...some...app" should be "...some...apps"

Author: xxdydx

src/content/11/en/part11a.md

@@ -7,7 +7,7 @@ lang: en
 
 <div class="content">
 
-During this part, you will build a robust <i>deployment pipeline</i> to a ready made [example project](https://github.com/smartlyio/full-stack-open-pokedex) starting in [exercise 11.2](/en/part11/getting_started_with_git_hub_actions#exercise-11-2). You will [fork](https://docs.github.com/en/free-pro-team@latest/github/getting-started-with-github/fork-a-repo) the example project and that will create you a personal copy of the repository. In the [last two](/en/part11/expanding_further#exercises-11-20-22) exercises, you will build another deployment pipeline for some of <i>your own</i> previously created app!
+During this part, you will build a robust <i>deployment pipeline</i> to a ready made [example project](https://github.com/smartlyio/full-stack-open-pokedex) starting in [exercise 11.2](/en/part11/getting_started_with_git_hub_actions#exercise-11-2). You will [fork](https://docs.github.com/en/free-pro-team@latest/github/getting-started-with-github/fork-a-repo) the example project and that will create you a personal copy of the repository. In the [last two](/en/part11/expanding_further#exercises-11-20-22) exercises, you will build another deployment pipeline for some of <i>your own</i> previously created apps!
 
 There are 21 exercises in this part, and you need to complete <i>each</i> exercise for completing the course. Exercises are submitted via [the submissions system](https://studies.cs.helsinki.fi/stats/courses/fs-cicd) just like in the previous parts, but unlike parts 0 to 7, the submission goes to a different "course instance".