Duplicate text in Contribution docs page

[matBonet]

The following text is duplicated in https://taskiq-python.github.io/contrib.html.

We love contributions. This guide is for all folks who want to make taskiq better together.

We have several rules for contributors:

Please do not add malware.
Please make sure that your request solves problem.

If you struggle with something or feel frustrating, you either create an issue, create a discussion on page or publish draft PR and ask your question in description.

We have lots of tests in CI. But since runs from first-time contributors should be approved you better test locally, it just takes less time.