Bump eslint-plugin-prettier from 5.1.3 to 5.2.6 in /extensions/ql-vscode

Bumps [eslint-plugin-prettier](https://github.com/prettier/eslint-plugin-prettier) from 5.1.3 to 5.2.6.
- [Release notes](https://github.com/prettier/eslint-plugin-prettier/releases)
- [Changelog](https://github.com/prettier/eslint-plugin-prettier/blob/main/CHANGELOG.md)
- [Commits](prettier/eslint-plugin-prettier@v5.1.3...v5.2.6)

---
updated-dependencies:
- dependency-name: eslint-plugin-prettier
  dependency-version: 5.2.6
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]