Bump webmozart/assert to ^2.4

[samsonasik]

webmozart/assert to 2.4.0 was cause downgrade issue:

https://github.com/rectorphp/rector-src/actions/runs/26181495364/job/77025550737

The temporary solution was pin to webmozart/assert 2.3.0.

• Temporary pin webmozart/assert to 2.3.0 to make downgrade working #7998

After some investigation, the issue seems on rector-downgrade-php, which solved at PR:

• [DowngradePhp82] Handle nullable true on DowngradeStandaloneNullTrueFalseReturnTypeRector rector-downgrade-php#374

This PR bump webmozart/assert to ^2.4

[samsonasik]

All green 🎉 @TomasVotruba let's merge to have faster feedback to test ;)

[samsonasik]

@TomasVotruba finally 🎉 🎉 🎉 downgrade build green with latest webmozart/assert 2.4.0

I think we need immediate new release so other packages can downgrade properly when using latest webmozart/assert 2.4.0 👍

[samsonasik]

I've released rector 2.4.4 https://github.com/rectorphp/rector/releases/tag/2.4.4

[TomasVotruba]

Looks good, thanks for new release 👍