Update README.md

Author: rasros

README.md

@@ -1,6 +1,10 @@
 <p align="center">
   <a href="https://eignex.com/">
-    <img src="https://raw.githubusercontent.com/Eignex/.github/refs/heads/main/profile/banner.svg" style="max-width: 100%; width: 22em"  alt="Eignex">
+    <picture>
+      <source media="(prefers-color-scheme: dark)" srcset="https://raw.githubusercontent.com/Eignex/.github/refs/heads/main/profile/banner-white.svg">
+      <source media="(prefers-color-scheme: light)" srcset="https://raw.githubusercontent.com/Eignex/.github/refs/heads/main/profile/banner.svg">
+      <img alt="Eignex" src="https://raw.githubusercontent.com/Eignex/.github/refs/heads/main/profile/banner.svg" style="max-width: 100%; width: 22em;">
+    </picture>
   </a>
 </p>