Update index.html

Author: rainliu

index.html

@@ -61,7 +61,7 @@
         <div class="message-body">
           <p>
             <a href="https://github.com/webrtc-rs/webrtc/actions"><img
-                src="https://github.com/webrtc-rs/webrtc/workflows/webrtc/badge.svg"></a> <a
+                src="https://github.com/webrtc-rs/webrtc/workflows/cargo/badge.svg"></a> <a
               href="https://codecov.io/gh/webrtc-rs/webrtc"><img
                 src="https://codecov.io/gh/webrtc-rs/webrtc/branch/master/graph/badge.svg"></a> <a
               href="https://deps.rs/repo/github/webrtc-rs/webrtc"><img