chore(deps): update dependency io.camunda:zeebe-process-test-extension-testcontainer to v8.6.4

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This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
io.camunda:zeebe-process-test-extension-testcontainer (source)	8.6.3 -> 8.6.4

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Release Notes

camunda/zeebe-process-test (io.camunda:zeebe-process-test-extension-testcontainer)

### [`v8.6.4`](https://redirect.github.com/camunda/zeebe-process-test/releases/tag/8.6.4) [Compare Source](https://redirect.github.com/camunda/zeebe-process-test/compare/8.6.3...8.6.4) #### What's Changed - Release 8.6.3 by [@​camundait](https://redirect.github.com/camundait) in [https://github.com/camunda/zeebe-process-test/pull/1252](https://redirect.github.com/camunda/zeebe-process-test/pull/1252) **Full Changelog**: https://github.com/camunda/zeebe-process-test/compare/8.6.3...8.6.4

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Configuration

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♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

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

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Test Results

 28 files  + 28   28 suites  +28   1m 20s ⏱️ + 1m 20s 251 tests +251  251 ✅ +251  0 💤 ±0  0 ❌ ±0  372 runs  +372  372 ✅ +372  0 💤 ±0  0 ❌ ±0 

Results for commit 13b15895. ± Comparison against base commit 90e29ded.