Update what-is-a-container.md (#23950)

Fixed grammar issue

OLD LINE
Since containers are run in isolation, they have minimal influence on
the host and other containers, increasing the security of your
applications.

NEW LINE
Since containers run in isolation, they have minimal influence on the
host and other containers, increasing the security of your applications.

Author: sharjeelfaiq

content/get-started/docker-concepts/the-basics/what-is-a-container.md

@@ -29,7 +29,7 @@ What is a container? Simply put, containers are isolated processes for each of y
 Here's what makes them awesome. Containers are:
 
 - Self-contained. Each container has everything it needs to function with no reliance on any pre-installed dependencies on the host machine.
-- Isolated. Since containers are run in isolation, they have minimal influence on the host and other containers, increasing the security of your applications.
+- Isolated. Since containers run in isolation, they have minimal influence on the host and other containers, increasing the security of your applications.
 - Independent. Each container is independently managed. Deleting one container won't affect any others.
 - Portable. Containers can run anywhere! The container that runs on your development machine will work the same way in a data center or anywhere in the cloud!