chore(deps): update dependency proto-plus to v1.22.3

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
proto-plus (source)	==1.22.1 -> ==1.22.3

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Release Notes

googleapis/proto-plus-python (proto-plus)

### [`v1.22.3`](https://togithub.com/googleapis/proto-plus-python/blob/HEAD/CHANGELOG.md#1223-2023-06-22) [Compare Source](https://togithub.com/googleapis/proto-plus-python/compare/v1.22.2...v1.22.3) ##### Bug Fixes - Resolve issue where marshal fails with cross api dependency ([#​348](https://togithub.com/googleapis/proto-plus-python/issues/348)) ([0dcea18](https://togithub.com/googleapis/proto-plus-python/commit/0dcea18898cdc2170a945f3d96216bae6a37e60f)) ### [`v1.22.2`](https://togithub.com/googleapis/proto-plus-python/blob/HEAD/CHANGELOG.md#1222-2023-01-05) [Compare Source](https://togithub.com/googleapis/proto-plus-python/compare/v1.22.1...v1.22.2) ##### Bug Fixes - Add support for Python 3.11 ([#​329](https://togithub.com/googleapis/proto-plus-python/issues/329)) ([5cff3a0](https://togithub.com/googleapis/proto-plus-python/commit/5cff3a0d703fc90f757f1d150adc0dfd62aa3d2e)) ##### Documentation - Fix typo in index.rst ([#​342](https://togithub.com/googleapis/proto-plus-python/issues/342)) ([a66a378](https://togithub.com/googleapis/proto-plus-python/commit/a66a3782802a1088c775a6b29adb15fa0235e1f1))

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