update getstream.io sponsor link

Author: yngrtc

index.html

@@ -153,16 +153,16 @@
         <br>
         <p>
           <strong>Silver Sponsors:</strong><br>
-          <a href="https://getstream.io/?utm_source=github.com/webrtc-rs/webrtc&utm_medium=github&utm_campaign=oss_sponsorship" target="_blank"><img
+          <a href="https://getstream.io/video/voice-calling/?utm_source=https://github.com/webrtc-rs/webrtc&utm_medium=sponsorship&utm_content=&utm_campaign=webrtcRepo_July2023_video_klmh22" target="_blank"><img
             src="https://stream-blog-v2.imgix.net/blog/wp-content/uploads/f7401112f41742c4e173c30d4f318cb8/stream_logo_white.png?w=350" alt="Stream Chat"></a>
         </p>
         <p>
           Enterprise Grade APIs for <a
-            href="https://getstream.io/activity-feeds/?utm_source=github.com/webrtc-rs/webrtc&utm_medium=github&utm_campaign=oss_sponsorship"
+            href="https://getstream.io/video/voice-calling/?utm_source=https://github.com/webrtc-rs/webrtc&utm_medium=sponsorship&utm_content=&utm_campaign=webrtcRepo_July2023_video_klmh22"
             target="_blank">Feeds</a> & <a
-            href="https://getstream.io/chat/?utm_source=github.com/webrtc-rs/webrtc&utm_medium=github&utm_campaign=oss_sponsorship"
+            href="https://getstream.io/video/voice-calling/?utm_source=https://github.com/webrtc-rs/webrtc&utm_medium=sponsorship&utm_content=&utm_campaign=webrtcRepo_July2023_video_klmh22"
             target="_blank">Chat</a>. <a
-            href="https://getstream.io/chat/get_started/?utm_source=github.com/webrtc-rs/webrtc&utm_medium=github&utm_campaign=oss_sponsorship"
+            href="https://getstream.io/video/voice-calling/?utm_source=https://github.com/webrtc-rs/webrtc&utm_medium=sponsorship&utm_content=&utm_campaign=webrtcRepo_July2023_video_klmh22"
             target="_blank">Try the interactive Chat tutorial</a> 💬
         </p>
         <br>