[skip ci]Update README.md

Author: kzscisoft

README.md

@@ -4,8 +4,8 @@
 
 <p align="center">
   <picture>
-    <source media="(prefers-color-scheme: dark)" srcset="https://github.com/simvue-io/.github/blob/5eb8cfd2edd3269259eccd508029f269d993282f/simvue-white.png" />
-    <source media="(prefers-color-scheme: light)" srcset="https://github.com/simvue-io/.github/blob/5eb8cfd2edd3269259eccd508029f269d993282f/simvue-black.png" />
+    <source media="(prefers-color-scheme: dark)" srcset="https://raw.githubusercontent.com/simvue-io/.github/refs/heads/main/simvue-white.png" />
+    <source media="(prefers-color-scheme: light)" srcset="https://raw.githubusercontent.com/simvue-io/.github/refs/heads/main/simvue-black.png" />
     <img alt="Simvue" src="https://github.com/simvue-io/.github/blob/5eb8cfd2edd3269259eccd508029f269d993282f/simvue-black.png" width="500">
   </picture>
 </p>