chore(deps): update dependency coverage to v7.6.8

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
coverage	==7.6.4 -> ==7.6.8

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Release Notes

nedbat/coveragepy (coverage)

v7.6.8

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• Fix: the LCOV report code assumed that a branch line that took no branches
  meant that the entire line was unexecuted. This isn't true in a few cases:
  the line might always raise an exception, or might have been optimized away.
  Fixes issue 1896_.

• Fix: similarly, the HTML report will now explain that a line that jumps to
  none of its expected destinations must have always raised an exception.
  Previously, it would say something nonsensical like, "line 4 didn't jump to
  line 5 because line 4 was never true, and it didn't jump to line 7 because
  line 4 was always true." This was also shown in issue 1896_.

.. _issue 1896:https://github.com/nedbat/coveragepy/issues/18966

.. _changes_7-6-7:

v7.6.7

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• fix: ugh, the other assert from 7.6.5 can also be encountered in the wild,
  so it's been restored to a conditional. Sorry for the churn.

.. _changes_7-6-6:

v7.6.6

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• One of the new asserts from 7.6.5 caused problems in real projects, as
  reported in issue 1891_. The assert has been removed.

.. _issue 1891:https://github.com/nedbat/coveragepy/issues/18911

.. _changes_7-6-5:

v7.6.5

Compare Source

• fix: fine-tuned the exact Python version (3.12.6) when exiting from with
  statements changed how they traced. This affected whether people saw the
  fix for issue 1880_.

• fix: isolate our code more from mocking in the os module that in rare cases
  can cause bizarre behavior <pytest-cov-666_>_.

• refactor: some code unreachable code paths in parser.py were changed to
  asserts. If you encounter any of these, please let me know!

.. _pytest-cov-666:https://github.com/pytest-dev/pytest-cov/issues/6666

.. _changes_7-6-4:

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