Draft: Update outdated URL for Versioning and Release process

What does this MR do?

Hello, I was making a test with secrets analyzer and saw that the release process URL in README seems to be not correct. My understanding is that its a link to Versioning and Release Process documentation in common repository. Feel free to merge if this is correct. Thanks

What are the relevant issue numbers?

By chance I saw also there is an issue related to it. https://gitlab.com/gitlab-org/security-products/analyzers/secrets/-/issues/5

Does this MR meet the acceptance criteria?

Not sure if Changelog needs to be added, as this is only a README correction, but let me know if I should do it.

• Changelog entry added
• Documentation created/updated for GitLab EE, if necessary
• Documentation created/updated for this project, if necessary
• Documentation reviewed by technical writer or follow-up review issue created
• Tests updated/added for this feature/bug
• Job definition updated, if necessary
  • Auto-DevOps template
  • Job definition example
  • CI Templates
• Conforms to the code review guidelines
• Conforms to the Go guidelines
• Security reports checked/validated by reviewer