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Bug 1772628 [wpt PR 34305] - Bump taskcluster from 44.14.0 to 44.15.5 in /tools, a=testonly

Automatic update from web-platform-tests
Bump taskcluster from 44.14.0 to 44.15.5 in /tools

Bumps [taskcluster](https://github.com/taskcluster/taskcluster) from 44.14.0 to 44.15.5.
- [Release notes](https://github.com/taskcluster/taskcluster/releases)
- [Changelog](https://github.com/taskcluster/taskcluster/blob/main/CHANGELOG.md)
- [Commits](https://github.com/taskcluster/taskcluster/compare/v44.14.0...v44.15.5)

---
updated-dependencies:
- dependency-name: taskcluster
dependency-type: direct:production
update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
--

wpt-commits: 5578f5810a7dda4a7c35838f6b9061356984752a
wpt-pr: 34305

commit	c0d472334636ee2aeafb3cb5ed15b8a57e0cfac8
author	dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
	Thu, 9 Jun 2022 16:23:00 +0000 (9 16:23 +0000)
committer	moz-wptsync-bot <wptsync@mozilla.com>
	Fri, 10 Jun 2022 03:33:24 +0000 (10 03:33 +0000)
tree	022c05f079ce03c5e4cef124d632b5ff0f947973	tree \| snapshot (tar.gz zip)
parent	bdd9a550b9d32200a5e09bbed5497b103dd273b5	commit \| diff

testing/web-platform/tests/tools/ci/requirements_tc.txt		diff \| blob \| blame \| history
testing/web-platform/tests/tools/requirements_tests.txt		diff \| blob \| blame \| history