Fix docker run in README.md

[alvarobartt]

What does this PR do?

This PR fixes the docker run command within the README.md since there was an extra 3.0.0 in between the command.

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• Did you read the contributor guideline, Pull Request section?
• Was this discussed/approved via a Github issue or the forum? Please add a link to it if that's the case.
• Did you make sure to update the documentation with your changes? Here are the documentation guidelines, and here are tips on formatting docstrings.
• Did you write any new necessary tests?

Who can review?

@OlivierDehaene OR @Narsil