chore(deps): update dependency tox to v4.15.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
tox (changelog)	==4.14.2 -> ==4.15.0

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Release Notes

tox-dev/tox (tox)

### [`v4.15.0`](https://togithub.com/tox-dev/tox/releases/tag/4.15.0) [Compare Source](https://togithub.com/tox-dev/tox/compare/4.14.2...4.15.0) #### What's Changed - Remove duplicated and misleading configuration section by [@​jugmac00](https://togithub.com/jugmac00) in [https://github.com/tox-dev/tox/pull/3251](https://togithub.com/tox-dev/tox/pull/3251) - Fix dropped leading characters `c` from constraints' packages by [@​jugmac00](https://togithub.com/jugmac00) in [https://github.com/tox-dev/tox/pull/3250](https://togithub.com/tox-dev/tox/pull/3250) - Fix type-checking by [@​stefanor](https://togithub.com/stefanor) in [https://github.com/tox-dev/tox/pull/3260](https://togithub.com/tox-dev/tox/pull/3260) - Update installation.rst by [@​shenxianpeng](https://togithub.com/shenxianpeng) in [https://github.com/tox-dev/tox/pull/3257](https://togithub.com/tox-dev/tox/pull/3257) - Allow appending to deps with the command line by [@​stefanor](https://togithub.com/stefanor) in [https://github.com/tox-dev/tox/pull/3259](https://togithub.com/tox-dev/tox/pull/3259) - Support multiple override appends by [@​amitschang](https://togithub.com/amitschang) in [https://github.com/tox-dev/tox/pull/3261](https://togithub.com/tox-dev/tox/pull/3261) - Add bang to invert exit code by [@​sillydan1](https://togithub.com/sillydan1) in [https://github.com/tox-dev/tox/pull/3271](https://togithub.com/tox-dev/tox/pull/3271) - fix(parser): Fix --discover parsed incorrectly from env by [@​mimre25](https://togithub.com/mimre25) in [https://github.com/tox-dev/tox/pull/3274](https://togithub.com/tox-dev/tox/pull/3274) #### New Contributors - [@​shenxianpeng](https://togithub.com/shenxianpeng) made their first contribution in [https://github.com/tox-dev/tox/pull/3257](https://togithub.com/tox-dev/tox/pull/3257) - [@​amitschang](https://togithub.com/amitschang) made their first contribution in [https://github.com/tox-dev/tox/pull/3261](https://togithub.com/tox-dev/tox/pull/3261) - [@​sillydan1](https://togithub.com/sillydan1) made their first contribution in [https://github.com/tox-dev/tox/pull/3271](https://togithub.com/tox-dev/tox/pull/3271) - [@​mimre25](https://togithub.com/mimre25) made their first contribution in [https://github.com/tox-dev/tox/pull/3274](https://togithub.com/tox-dev/tox/pull/3274) **Full Changelog**: https://github.com/tox-dev/tox/compare/4.14.2...4.15.0

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Configuration

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