Update src/client.rs

Author: hawkw

src/client.rs

@@ -1237,7 +1237,7 @@ where
     /// This method returns the currently acknowledged value recieved from the
     /// remote.
     ///
-    /// [settings]: https://tools.ietf.org/html/rfc7540#section-5.1.2
+    /// [1]: https://tools.ietf.org/html/rfc7540#section-5.1.2
     pub fn max_concurrent_send_streams(&self) -> usize {
         self.inner.max_send_streams()
     }