chore(deps): update dependency providers/flagd/test-harness to v2.15.9

[renovate]

This PR contains the following updates:

Package	Update	Change
providers/flagd/test-harness	minor	v2.13.0 → v2.15.9

---

Release Notes

open-feature/test-harness (providers/flagd/test-harness)

v2.15.9

Compare Source

🐛 Bug Fixes

• make file update atomic, wait for /start (#​329) (64011fa)

v2.15.8

Compare Source

🐛 Bug Fixes

• race condition in /stop (#​327) (8bafdaf)

v2.15.7

Compare Source

🐛 Bug Fixes

• correct default retryBackoffMaxMs value (7408867)

v2.15.6

Compare Source

🐛 Bug Fixes

• more possible change deadlocks (#​324) (e103d93)

v2.15.5

Compare Source

🐛 Bug Fixes

• revert ends_with non-string change (14eb032)

v2.15.4

Compare Source

🐛 Bug Fixes

• deadlock if /change is called during /restart (#​321) (4583da2)

v2.15.3

Compare Source

🐛 Bug Fixes

• Refactor in-process sync port scenarios (#​318) (1f6845c)

v2.15.2

Compare Source

🐛 Bug Fixes

• Add fatalStatusCodes tags in config gherkin (#​316) (49764f6)

v2.15.1

Compare Source

🐛 Bug Fixes

• Add @​sync-port tag to in-process scenarios (#​314) (3af557a)

v2.15.0

Compare Source

🐛 Bug Fixes

• remove file mode from forbidden flagd connection test (#​312) (1759a94)

✨ New Features

• Add FLAGD_BASE_IMAGE build argument to Dockerfile (#​308) (779adad)
• Add FLAGD_SYNC_PORT support for in-process providers with backwards compatibility (#​310) (513f2a9)
• add missing steps for config and improve wording (#​311) (c1f632b)
• Support multi-platform build (#​313) (e1ff79c)

v2.14.0

Compare Source

✨ New Features

• improve forbidden with options (#​304) (00b7cfb)

v2.13.1

Compare Source

🧹 Chore

• add test to ensure fatal state on forbidden error (#​756) (#​302) (446a9f5)

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.