Fix Platform.sh template

[rhubinak]

Missing sodium PHP extension results in an inability to build the the project on platform.sh

      Found a `composer.json`, installing dependencies.
        W: Installing dependencies from lock file (including require-dev)
        W: Verifying lock file contents can be installed on current platform.
        W: Your lock file does not contain a compatible set of packages. Please run composer update.
        W: 
        W:   Problem 1
        W:     - lcobucci/jwt is locked to version 4.3.0 and an update of this package was not requested.
        W:     - lcobucci/jwt 4.3.0 requires ext-sodium * -> it is missing from your system. Install or enable PHP's sodium extension.
        W:   Problem 2
        W:     - lcobucci/jwt 4.3.0 requires ext-sodium * -> it is missing from your system. Install or enable PHP's sodium extension.
        W:     - lexik/jwt-authentication-bundle v2.17.0 requires lcobucci/jwt ^3.4|^4.0 -> satisfiable by lcobucci/jwt[4.3.0].
        W:     - lexik/jwt-authentication-bundle is locked to version v2.17.0 and an update of this package was not requested.
        W: 
        W: To enable extensions, verify that they are enabled in your .ini files:
        W:     - /etc/php/8.3/cli/php.ini
        W: You can also run `php --ini` in a terminal to see which files are used by PHP in CLI mode.
        W: Alternatively, you can run Composer with `--ignore-platform-req=ext-sodium` to temporarily ignore these required extensions.
      
      E: Error building project: `composer` could not be run.

    E: Error: Unable to build application, aborting.

This will fix it resulting in a successful build.

[TheMilek]

Hi @rhubinak!

Could you please provide the exact version of Sylius you are using? 🤔
I tried both 1.13 and 1.14, but couldn’t reproduce the issue.

Thanks in advance! 🍻

[TheMilek]

Hey!

After further investigation, I found that the issue lies with the lcobucci/jwt dependency, which is version 4.0.4 in my case. It seems something may have bumped it, but I couldn’t identify any conflict or anything else that might have caused it 🤔.

Nonetheless, after discussing with the team, we’ve decided to proceed with this PR anyway, as it appears we’ll need sodium in Sylius 2.0. I’ve also opened two additional PRs with a co-author, of course 😅.
Thank you very much for your effort 🥇