Typo Signalr

Author: yekalkan

doc/Development-Guide-Core.html

@@ -1403,7 +1403,7 @@ <h3>Used Library &amp; Frameworks</h3>
 		<a href="https://docs.microsoft.com/en-us/aspnet/core/security/authentication/identity" target="_blank">ASP.NET Identity 
 		Core (and social login extensions)</a></li>
 		<li>
-		<a href="http://www.asp.net/signalr" target="_blank">SignSignalR</a></li>
+		<a href="http://www.asp.net/signalr" target="_blank">SignalR</a></li>
 		<li>
 		<a href="https://docs.microsoft.com/en-us/ef/core/index" target="_blank">
 		EntityFramework Core</a></li>