Is there a way to stop Snyk from creating GitHub pull requests with changes like dependency updates and patches?

Disable automated GitHub pull requests

Snyk notifies you about new vulnerabilities for your projects with an email, and by opening a pull request with fixes on GitHub.

To disable automatic pull requests:

1. Click on settings  > Integrations.
2. For the GitHub entry, click Edit Settings:
   
3. In Automatic fix pull requests, Uncheck either New vulnerabilities or Known vulnerabilties (backlog), depending upon your needs:
   
4. Click Save changes.