fix(deps): update version.zeebe to v8.6.6

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
io.camunda:zeebe-build-tools (source)	8.6.5 -> 8.6.6
io.camunda:zeebe-bom (source)	8.6.5 -> 8.6.6

---

Release Notes

camunda/camunda (io.camunda:zeebe-build-tools)

v8.6.6

Compare Source

8.6.6

Bug Fixes

Broker

• Zeebe user tasks not terminated on process instance modification (#​24672)

Java Client

• OAuthCredentialsCache in Zeebe Java client does not work correctly in multi-tenancy setup (#​20471)

Misc

• Form cache is corrupt and causes inconsistent processing (#​25504)
• Process instance no longer subscribed to message after unsuccessful process instance migration (#​25166)
• Instance migration for the processes with event subprocess is not possible (#​25071)
• OrderedCommandDistributionMigration is never executed (#​24836)
• Elasticsearch deprecation warning logs: [ignore_throttled] parameter is deprecated (#​24801)
• Retry complete follower append on flush error (#​14867)

Merged Pull Requests

• fix: don't use mutable keys for forms cache (#​25523)
• fix: apply nested configuration properties (#​24957)
• All Zeebe CI jobs need to specify GHA timeouts (#​24880)
• Register OrderedCommandDistributionMigration migration task (#​24838)
• fix: throw correct error instead of InternalError (#​24680)
• fix: cancel user tasks on instance modification (#​24673)
• perf: remove redundant synchronized (#​24621)
• fix: switch client credential cache key to clientId (#​24519)
• ci: push testbench images to SaaS registry (#​24497)
• ci: do not auto-merge release PRs (#​24438)
• feature: when a follower fails to flush respond with error to leader (#​24378)
• ci: use non-preemptible runners for jobs with highest disconnect rate (#​24370)

---

Configuration

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

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

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

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

---

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

---

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