minor symfony#21278 chore(readme): upgrade logo (94noni)

This PR was submitted for the 7.3 branch but it was merged into the 6.4 branch instead.

Discussion
----------

 chore(readme): upgrade logo

for light/dark mode (I am browsing always in dark) and this logo is full white

taken from https://github.com/symfony/symfony (same /ux /ai etc)

Commits
-------

1322666 chore(readme): upgrade logo

Author: javiereguiluz

README.md

@@ -1,5 +1,5 @@
 <p align="center"><a href="https://symfony.com" target="_blank">
-  <img src="https://symfony.com/logos/symfony_black_02.svg">
+    <img src="https://symfony.com/logos/symfony_dynamic_01.svg" alt="Symfony Logo">
 </a></p>
 
 <h3 align="center">