Merge pull request #2736 from uptimistic/patch-2

Update part12a.md

Author: mluukkai

src/content/12/en/part12a.md

@@ -7,7 +7,7 @@ lang: en
 
 <div class="content">
 
-Software development includes the whole lifecycle from envisioning the software to programming and to releasing the it to the end-users and even maintaining it. This part will introduce containers, a modern tool utilized in the latter parts of the software lifecycle.
+Software development includes the whole lifecycle from envisioning the software to programming and to releasing it to the end-users and even maintaining it. This part will introduce containers, a modern tool utilized in the latter parts of the software lifecycle.
 
 Containers encapsulate your application into a single package. This package will then include all of the dependencies with the application. As a result, each container can run isolated from the other containers.