Update sirbrillig/phpcs-variable-analysis requirement
Update sirbrillig/phpcs-variable-analysis requirement

Updates the requirements on [sirbrillig/phpcs-variable-analysis](https://github.com/sirbrillig/phpcs-variable-analysis) to permit the latest version.
- [Release notes](https://github.com/sirbrillig/phpcs-variable-analysis/releases)
- [Commits](https://github.com/sirbrillig/phpcs-variable-analysis/compare/v2.10.0...v2.10.1)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
ampproject/amp-toolbox-php,ampproject/amp-toolbox-php