Fix image filename in README.md

Author: gnarzilla

README.md

@@ -11,7 +11,7 @@ A high-performance, multi-protocol proxy server built for **real-world condition
 
 [Quick Start](#quick-start) · [Features](#features) · [API](#rest-api) · [Configuration](#configuration) · [Documentation](docs/) · [Architecture](#architecture) · [Roadmap](#roadmap)
 
-![UI with live connection table](src/assets/media/webui-04-25-26.gif)
+![UI with live connection table](src/assets/media/webui-4-25-26.gif)
 
 > **Security Notice:** This proxy can perform TLS interception.
 > Only deploy on hardware you control. See [Security Considerations](#security-considerations).