Fix docker-compose command

[kanoshiou]

This PR reverts #5681.

Since the README already instructs users to ensure that Docker Compose is installed, it is reasonable to assume that Docker Compose is already installed.

dify/README.md

Line 62 in d1ca492

The easiest way to start the Dify server is through [docker compose](docker/docker-compose.yaml). Before running Dify with the following commands, make sure that [Docker](https://docs.docker.com/get-docker/) and [Docker Compose](https://docs.docker.com/compose/install/) are installed on your machine:

Moreover, this is a backend document, and I believe it is essential to ensure the accuracy of the documentation. Especially since this is within a markdown code block, every line must run correctly (if there is an error, you should Google where the problem is or raise an issue).

And if they are indeed noobs, the original modification would actually lead them in the wrong direction.