deps: Update dependency google-auth to v2.26.1

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
google-auth	==2.25.1 -> ==2.26.1

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Release Notes

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

### [`v2.26.1`](https://togithub.com/googleapis/google-auth-library-python/blob/HEAD/CHANGELOG.md#2261-2024-01-03) [Compare Source](https://togithub.com/googleapis/google-auth-library-python/compare/v2.26.0...v2.26.1) ##### Bug Fixes - Ensure that refresh worker is pickle-able. ([#​1447](https://togithub.com/googleapis/google-auth-library-python/issues/1447)) ([421c184](https://togithub.com/googleapis/google-auth-library-python/commit/421c184ff4654024afe3e64754318a6be0cc96fc)) ### [`v2.26.0`](https://togithub.com/googleapis/google-auth-library-python/blob/HEAD/CHANGELOG.md#2260-2023-12-20) [Compare Source](https://togithub.com/googleapis/google-auth-library-python/compare/v2.25.2...v2.26.0) ##### Features - Add optional non blocking refresh for sync auth code ([a6dc2c3](https://togithub.com/googleapis/google-auth-library-python/commit/a6dc2c336a5e76a478691e3bedd0418aae08b911)) - Add optional non blocking refresh for sync auth code ([#​1368](https://togithub.com/googleapis/google-auth-library-python/issues/1368)) ([a6dc2c3](https://togithub.com/googleapis/google-auth-library-python/commit/a6dc2c336a5e76a478691e3bedd0418aae08b911)) ##### Bug Fixes - External account user cred universe domain support ([#​1437](https://togithub.com/googleapis/google-auth-library-python/issues/1437)) ([75068f9](https://togithub.com/googleapis/google-auth-library-python/commit/75068f93453e6ea0b5c7be5561e7ba342c695e95)) - Guard delete statements. Add default fallback for \_use_non_blocking_refresh. ([#​1445](https://togithub.com/googleapis/google-auth-library-python/issues/1445)) ([776d634](https://togithub.com/googleapis/google-auth-library-python/commit/776d634ac6d989b224f8dbfb11d166cb3025a342)) ### [`v2.25.2`](https://togithub.com/googleapis/google-auth-library-python/blob/HEAD/CHANGELOG.md#2252-2023-12-08) [Compare Source](https://togithub.com/googleapis/google-auth-library-python/compare/v2.25.1...v2.25.2) ##### Bug Fixes - Fix user cred universe domain issue ([#​1436](https://togithub.com/googleapis/google-auth-library-python/issues/1436)) ([ae314a8](https://togithub.com/googleapis/google-auth-library-python/commit/ae314a8f8c63ada4e31683464c24e28df0f5af7f))

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[dpebot]

/gcbrun