Update dependency celery to v5.2.6 (develop)

This MR contains the following updates:

Package	Type	Update	Change
celery (source, changelog)	dependencies	patch	==5.2.3 -> ==5.2.6

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Release Notes

celery/celery

v5.2.6

Compare Source

Release date: 2022-4-04 21:15 P.M UTC+2:00

Release by: Omer Katz

load_extension_class_names - correct module_name (#​7433).

:   This fixes a regression caused by #​7218.

v5.2.5

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:release-date: 2022-4-03 20:42 P.M UTC+2:00 :release-by: Omer Katz

• Use importlib instead of deprecated pkg_resources (#​7218).

.. _version-5.2.4:

v5.2.4

Compare Source

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:release-date: 2022-4-03 20:30 P.M UTC+2:00 :release-by: Omer Katz

• Expose more debugging information when receiving unknown tasks (#​7404).

.. _version-5.2.3:

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