fix typo

Author: mburleigh

samples/Management/README.md

@@ -45,10 +45,10 @@ dotnet run
 Once the message publisher get started, use the command to send message
 
 ```
-send user <User ID List (Seperated by ',')> <Message>
+send user <User ID List (Separated by ',')> <Message>
 send users <User List> <Message>
 send group <Group Name> <Message>
-send groups <Group List (Seperated by ',')> <Message>
+send groups <Group List (Separated by ',')> <Message>
 usergroup add <User ID> <Group Name>
 usergroup remove <User ID> <Group Name>
 broadcast <Message>
@@ -67,4 +67,4 @@ The following links are guides for building 3 components of this management samp
 
 * [Message Publisher](./MessagePublisher/README.md)
 * [Negotiation Server](./NegotiationServer/README.md)
-* [SignalR Client](./SignalRClient/README.md)
+* [SignalR Client](./SignalRClient/README.md)