message: docs: remove GitAds
diff: # testing-nestjs
  -## Sponsor
  -
  -testing-nestjs is being sponsored by the following tool; please help to support us by taking a look and signing up to a free trial
  -
  -<a href="https://tracking.gitads.io/?repo=testing-nestjs">
  - <img src="https://images.gitads.io/testing-nestjs" alt="GitAds"/>
  -</a>
  -
  ## Status
  <div align="center">
  