Update with-docker.en-us.md (#5203)

Improve grammar in second paragraph.

docs/content/doc/installation/with-docker.en-us.md

@@ -19,8 +19,8 @@ Gitea provides automatically updated Docker images within its Docker Hub organiz
 possible to always use the latest stable tag or to use another service that handles updating
 Docker images.
 
-This reference setup guides users through the setup based on `docker-compose`, the installation
-of `docker-compose` is out of scope of this documentation. To install `docker-compose` follow
+This reference setup guides users through the setup based on `docker-compose`, but the installation
+of `docker-compose` is out of scope of this documentation. To install `docker-compose` itself follow
 the official [install instructions](https://docs.docker.com/compose/install/).
 
 ## Basics