Update dependency celery to v5.2.7 (develop)

This MR contains the following updates:

Package	Type	Update	Change
celery (source, changelog)	dependencies	patch	==5.2.6 -> ==5.2.7

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Release Notes

celery/celery

v5.2.7

Compare Source

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:release-date: 2022-5-26 12:15 P.M UTC+2:00 :release-by: Omer Katz

• Fix packaging issue which causes poetry 1.2b1 and above to fail install Celery (#​7534).

.. _version-5.2.6:

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