composer: Update dependencies

 - bcosca/fatfree-core updated from 3.8.2 to 3.9.0 minor
   See changes: f3-factory/fatfree-core@3.8.2...3.9.0
   Release notes: https://github.com/f3-factory/fatfree-core/releases/tag/3.9.0

 - react/child-process updated from v0.6.5 to v0.6.6 patch
   See changes: reactphp/child-process@v0.6.5...v0.6.6
   Release notes: https://github.com/reactphp/child-process/releases/tag/v0.6.6

 - friendsofphp/php-cs-fixer updated from v3.65.0 to v3.69.1 minor
   See changes: PHP-CS-Fixer/PHP-CS-Fixer@v3.65.0...v3.69.1
   Release notes: https://github.com/PHP-CS-Fixer/PHP-CS-Fixer/releases/tag/v3.69.1

 - j0k3r/graby-site-config updated from 1.0.194 to 1.0.196 patch
   See changes: j0k3r/graby-site-config@1.0.194...1.0.196
   Release notes: https://github.com/j0k3r/graby-site-config/releases/tag/1.0.196

 - phpstan/phpstan updated from 2.0.4 to 2.1.6 minor
   See changes: phpstan/phpstan@2.0.4...2.1.6
   Release notes: https://github.com/phpstan/phpstan/releases/tag/2.1.6

Author: jtojnar