update symfony/http-foundation

currently, there is a requirement in composer.json for:

"symfony/http-foundation": "^5.0",

that version of http-foundation does not list PHP >=8 as a requirement.

This version should be updated to

"symfony/http-foundation": "^6.0"

to be in alignment with the requirements for PHP >=8

Open composer.json and inspect the symfony/http-foundation requirement. Update it to the PHP 8-compatible version stated in the issue, then verify that Composer resolves the dependency successfully with PHP >=8; done means the requirement is aligned without dependency conflicts.

Written by the indexing model from the issue text.