fix url

README.md

@@ -23,7 +23,7 @@ Because of this, it only targets the JVM, although a KMP rewrite (also targeting
 This JVM-centricity is also the reason why the function signatures are rather JVM-esque (read: exceptions are thrown on error,
 as done by pretty much every verification function of classes form the `java.security` package).
 
-This library is an integral part of the more comprehensive [Attestation Service](https://github.com/a-sit-plus/attestation-service), which also supports iOS clients and provides
+This library is an integral part of the more comprehensive [Attestation Service](https://github.com/a-sit-plus/warden), which also supports iOS clients and provides
 more idiomatic kotlin interfaces.
 However, if you are only concerned about Android clients, this library provides all functionality needed without unnecessary bloat.