Bump webonyx/graphql-php from 15.19.1 to 15.31.5

Bumps [webonyx/graphql-php](https://github.com/webonyx/graphql-php) from 15.19.1 to 15.31.5.
- [Release notes](https://github.com/webonyx/graphql-php/releases)
- [Changelog](https://github.com/webonyx/graphql-php/blob/master/CHANGELOG.md)
- [Commits](webonyx/graphql-php@v15.19.1...v15.31.5)

---
updated-dependencies:
- dependency-name: webonyx/graphql-php
  dependency-version: 15.31.5
  dependency-type: indirect
...

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Author: dependabot[bot]