Modify Star History section in README

Updated Star History section with new image sources and tokens.

Author: esokullu

README.md

@@ -337,11 +337,13 @@ All providers normalize to a common response format:
 
 ## Star History
 
+## Star History
+
 <a href="https://www.star-history.com/?repos=webbrain-one%2Fwebbrain&type=date&legend=top-left">
  <picture>
-   <source media="(prefers-color-scheme: dark)" srcset="https://api.star-history.com/chart?repos=webbrain-one/webbrain&type=date&theme=dark&legend=top-left" />
-   <source media="(prefers-color-scheme: light)" srcset="https://api.star-history.com/chart?repos=webbrain-one/webbrain&type=date&legend=top-left" />
-   <img alt="Star History Chart" src="https://api.star-history.com/chart?repos=webbrain-one/webbrain&type=date&legend=top-left" />
+   <source media="(prefers-color-scheme: dark)" srcset="https://api.star-history.com/chart?repos=webbrain-one/webbrain&type=date&theme=dark&legend=top-left&sealed_token=pEVOa2e14jxSLxQdCH2zPHJpjdCUYgWImET-_h_dgTuQYqEzR3f5pOzIyYGKN_gFHT-oZqKTM_yZfWHwwMtmM0Jb5YZvGgyuF6cF-w4vHVDdkJoUirCJjQ" />
+   <source media="(prefers-color-scheme: light)" srcset="https://api.star-history.com/chart?repos=webbrain-one/webbrain&type=date&legend=top-left&sealed_token=pEVOa2e14jxSLxQdCH2zPHJpjdCUYgWImET-_h_dgTuQYqEzR3f5pOzIyYGKN_gFHT-oZqKTM_yZfWHwwMtmM0Jb5YZvGgyuF6cF-w4vHVDdkJoUirCJjQ" />
+   <img alt="Star History Chart" src="https://api.star-history.com/chart?repos=webbrain-one/webbrain&type=date&legend=top-left&sealed_token=pEVOa2e14jxSLxQdCH2zPHJpjdCUYgWImET-_h_dgTuQYqEzR3f5pOzIyYGKN_gFHT-oZqKTM_yZfWHwwMtmM0Jb5YZvGgyuF6cF-w4vHVDdkJoUirCJjQ" />
  </picture>
 </a>