Fix Minor Capitalization Issue in README.md (sherlock-project#2716)

Author: matheusfelipeog

docs/README.md

@@ -124,7 +124,7 @@ Thank you to everyone who has contributed to Sherlock! ❤️
   <img src="https://contrib.rocks/image?&columns=25&max=10000&&repo=sherlock-project/sherlock" alt="contributors"/>
 </a>
 
-## Star history
+## Star History
 
 <picture>
   <source media="(prefers-color-scheme: dark)" srcset="https://api.star-history.com/svg?repos=sherlock-project/sherlock&type=Date&theme=dark" />