build(deps): bump actions/checkout from 6 to 7 - #7

Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires symfony/yaml ^5.4|^6.0|^7.0, found symfony/yaml[v5.4.0, ..., v5.4.53, v6.0.0, ..., v6.4.42, v7.0.0, ..., v7.4.14] but these were not loaded, because they are affected by security advisories ("PKSA-v5yj-8nmz-sk2q", "PKSA-ft77-7h5f-p3r6", "PKSA-b14r-zh1d-vdrc"). Go to https://packagist.org/security-advisories/ to find advisory details. To ignore the advisories, add their IDs to the "policy.advisories.ignore-id" config or add the package to "policy.advisories.ignore". To turn the feature off entirely, you can set "policy.advisories.block" to false. Problem 2 - Root composer.json requires symfony/framework-bundle ^5.4|^6.0|^7.0 -> satisfiable by symfony/framework-bundle[v7.3.0, ..., v7.3.11]. - symfony/framework-bundle[v7.3.0, ..., v7.3.11] require symfony/cache ^6.4|^7.0 -> found symfony/cache[v6.4.0, ..., v6.4.42, v7.0.0, ..., v7.4.14] but these were not loaded, because they are affected by security advisories ("PKSA-z7t6-zt6p-wtng"). Go to https://packagist.org/security-advisories/ to find advisory details. To ignore the advisories, add their IDs to the "policy.advisories.ignore-id" config or add the package to "policy.advisories.ignore". To turn the feature off entirely, you can set "policy.advisories.block" to false.