docs: xmldoc for DisconnectReason (#2300)

Author: jeffreyrainy

com.unity.netcode.gameobjects/Editor/NetworkBehaviourEditor.cs

@@ -7,6 +7,9 @@
 
 namespace Unity.Netcode.Editor
 {
+    /// <summary>
+    /// The <see cref="CustomEditor"/> for <see cref="NetworkBehaviour"/>
+    /// </summary>
     [CustomEditor(typeof(NetworkBehaviour), true)]
     [CanEditMultipleObjects]
     public class NetworkBehaviourEditor : UnityEditor.Editor

com.unity.netcode.gameobjects/Runtime/Core/NetworkManager.cs

@@ -86,10 +86,10 @@ public NetworkPrefabHandler PrefabHandler
         private bool m_ShuttingDown;
         private bool m_StopProcessingMessages;
 
-        // <summary>
-        // When disconnected from the server, the server may send a reason. If a reason was sent, this property will
-        // tell client code what the reason was. It should be queried after the OnClientDisconnectCallback is called
-        // </summary>
+        /// <summary>
+        /// When disconnected from the server, the server may send a reason. If a reason was sent, this property will
+        /// tell client code what the reason was. It should be queried after the OnClientDisconnectCallback is called
+        /// </summary>
         public string DisconnectReason { get; internal set; }
 
         private class NetworkManagerHooks : INetworkHooks
@@ -450,9 +450,10 @@ public class ConnectionApprovalResponse
             /// </summary>
             public bool Pending;
 
-            // <summary>
-            // Optional reason. If Approved is false, this reason will be sent to the client so they know why they
-            // were not approved.
+            /// <summary>
+            /// Optional reason. If Approved is false, this reason will be sent to the client so they know why they
+            /// were not approved.
+            /// </summary>
             public string Reason;
         }