Update expectations

What does this MR do?

Adds missing expectation for ruleset synthesis. Our test orchestrator has been failing since we renamed Custom-Ruleset-Synthesis to Custom-Ruleset-Synthesis-FREEZE as it's now picking up that branch via scheduled runs. We don't have a preset expectation for that one so it defaults to project name. We will need to update the SAST_REPORT_URL reference one this MR has been merged.

Test MR gitlab-org/security-products/tests/go!40 (merged)

What are the relevant issue numbers?

N/A

Does this MR meet the acceptance criteria?

• [-] 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 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