Fix moved help url for autodeploy

What does this MR do?

Fixes moved help url for autodeploy to the correct one

For gitlab.com links to verify:

Before: https://gitlab.com/help/ci/autodeploy/index

After: https://gitlab.com/help/topics/autodevops/index.md#auto-deploy

Screenshots

Before

After

Does this MR meet the acceptance criteria?

Conformity

• Code review guidelines
• Style guides
• Separation of EE specific content