minor #1423 [DX] Use dark-mode Symfony logo (smnandre)

This PR was merged into the 2.x branch.

Discussion
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[DX] Use dark-mode Symfony logo

See symfony/symfony#53676

| Before | After |
| - | - |
| ![before_dark](https://github.com/symfony/symfony/assets/1359581/a01633d4-c0e5-45fd-b158-8f007bd22144) | ![after_dark](https://github.com/symfony/symfony/assets/1359581/ebacc787-b049-435e-9615-eead19743f39) |

Commits
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7260c6b [DX] Use dark-mode Symfony logo

Author: weaverryan

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">