Update dependency pytest to v8

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
pytest (source, changelog)	>=7,<8 -> >=8,<9

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Release Notes

pytest-dev/pytest (pytest)

### [`v8.0.0`](https://togithub.com/pytest-dev/pytest/compare/7.4.4...8.0.0) [Compare Source](https://togithub.com/pytest-dev/pytest/compare/7.4.4...8.0.0)

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Configuration

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🔕 Ignore: Close this PR and you won't be reminded about this update again.

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Test coverage for 24ec5dbd69d6f1d8160a0dae5aad82d8818de8c7

Name                      Stmts   Miss Branch BrPart  Cover   Missing
---------------------------------------------------------------------
src/__init__.py              97      0     42      0   100%
src/action.py               155      0     46      0   100%
src/check.py                 67      0     27      0   100%
src/clients.py               12      0      0      0   100%
src/commit.py                42      0     12      0   100%
src/constants.py             10      0      0      0   100%
src/content.py               50      0     10      0   100%
src/discourse.py            159      0     34      0   100%
src/docs_directory.py        33      0      8      0   100%
src/download.py              23      0      2      0   100%
src/exceptions.py            15      0      0      0   100%
src/index.py                142      0     56      0   100%
src/metadata.py              28      0     12      0   100%
src/migration.py            102      0     33      0   100%
src/navigation_table.py      65      0     20      0   100%
src/reconcile.py            123      0     60      0   100%
src/repository.py           284      0     88      0   100%
src/sort.py                  43      0     26      0   100%
src/types_.py               201      0     54      0   100%
---------------------------------------------------------------------
TOTAL                      1651      0    530      0   100%

Static code analysis report

Working... ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 100% 0:00:03
Run started:2024-02-08 15:41:46.779393

Test results:
    No issues identified.

Code scanned:
    Total lines of code: 17623
    Total lines skipped (#nosec): 3
    Total potential issues skipped due to specifically being disabled (e.g., #nosec BXXX): 0

Run metrics:
    Total issues (by severity):
        Undefined: 0
        Low: 0
        Medium: 0
        High: 0
    Total issues (by confidence):
        Undefined: 0
        Low: 0
        Medium: 0
        High: 0
Files skipped (0):