Update README.md

Rusty Rain · web-flow · commit f710b2ec05a4 · 2021-09-20T16:20:09.000-07:00
diff --git a/README.md b/README.md
@@ -26,5 +26,5 @@
  </a>
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 <p align="center">
- A pure Rust implementation of RTCP. Rewrite <a href="http://Pion.ly">Pion</a> RTCP in Rust
+ A pure Rust implementation of RTCP. Rewrite <a href="https://github.com/pion/rtcp/releases/tag/v1.2.4">Pion</a> RTCP in Rust
 </p>
