chore(deps): update dependency google-auth to v2.31.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
google-auth	==2.30.0 -> ==2.31.0

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Release Notes

googleapis/google-auth-library-python (google-auth)

### [`v2.31.0`](https://togithub.com/googleapis/google-auth-library-python/blob/HEAD/CHANGELOG.md#2310-2024-06-27) [Compare Source](https://togithub.com/googleapis/google-auth-library-python/compare/v2.30.0...v2.31.0) ##### Features - Adds X509 workload cert logic ([#​1527](https://togithub.com/googleapis/google-auth-library-python/issues/1527)) ([05220e0](https://togithub.com/googleapis/google-auth-library-python/commit/05220e06a23b3d4c398628918dab113abcce52db)) ##### Bug Fixes - Added py.typed to MANIFEST.in ([#​1526](https://togithub.com/googleapis/google-auth-library-python/issues/1526)) ([1829a3b](https://togithub.com/googleapis/google-auth-library-python/commit/1829a3be18aea5eca8b7272111d75eb61a6077b1)) - Pass trust_env kwarg to ClientSession ([#​1533](https://togithub.com/googleapis/google-auth-library-python/issues/1533)) ([6c15c9a](https://togithub.com/googleapis/google-auth-library-python/commit/6c15c9ad0ff90cf9bac044b38e72956aa3039cf6)), closes [#​1530](https://togithub.com/googleapis/google-auth-library-python/issues/1530)

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