Update dependency pytest to v6.2.5

This MR contains the following updates:

Package	Type	Update	Change
pytest (source, changelog)	ironbank-pypi	patch	6.2.4 -> 6.2.5

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Release Notes

pytest-dev/pytest

v6.2.5

Compare Source

pytest 6.2.5 (2021-08-29)

Trivial/Internal Changes

• #​8494: Python 3.10 is now supported.
• #​9040: Enable compatibility with pluggy 1.0 or later.

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