fix(deps): update dependency google/cloud-language to ^0.31.0

[renovate-bot]

This PR contains the following updates:

Package	Type	Update	Change
google/cloud-language	require	minor	^0.30.2 -> ^0.31.0

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Release Notes

googleapis/google-cloud-php-language (google/cloud-language)

### [`v0.31.0`](https://togithub.com/googleapis/google-cloud-php-language/releases/tag/v0.31.0): google/cloud-language v0.31.0 [Compare Source](https://togithub.com/googleapis/google-cloud-php-language/compare/v0.30.2...v0.31.0) ##### Features - Introduce Language V2 ([#​6556](https://togithub.com/googleapis/google-cloud-php/issues/6556)) ([169d502](https://togithub.com/googleapis/google-cloud-php/commit/169d5021ae914e260255ed8970184f700ac55f90))

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