update copy-paste mistake in readme

Author: jbr

README.md

@@ -1,5 +1,6 @@
 # Tide rustls listener
-## redis-backed session store for [async-session](https://github.com/http-rs/async-session)
+
+## async tls listener based on [async-tls](https://github.com/async-rs/async-tls) and [rustls](https://github.com/ctz/rustls)
 
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