test xmldoc fixes

Author: Aurimas Petrovas

com.unity.ml-agents/Runtime/Academy.cs

@@ -136,7 +136,7 @@ public static bool IsInitialized
         /// <summary>
         /// Reports whether or not the communicator is on.
         /// </summary>
-        /// <see cref="ICommunicator"/>
+        /// <seealso cref="ICommunicator"/>
         /// <value>
         /// <c>True</c>, if communicator is on, <c>false</c> otherwise.
         /// </value>
@@ -400,7 +400,7 @@ static int ReadPortFromArgs()
         /// then the values of the parameters generated from the training process can be
         /// retrieved here.
         /// </summary>
-        /// <returns>The `EnvironmentParameters` instance.</returns>
+        /// <value>The `EnvironmentParameters` instance.</value>
         public EnvironmentParameters EnvironmentParameters
         {
             get { return m_EnvironmentParameters; }

com.unity.ml-agents/Runtime/Actuators/ActuatorComponent.cs

@@ -19,7 +19,7 @@ public abstract class ActuatorComponent : MonoBehaviour
         /// The specification of the possible actions for this ActuatorComponent.
         /// This must produce the same results as the corresponding IActuator's ActionSpec.
         /// </summary>
-        /// <see cref="ActionSpec"/>
+        /// <seealso cref="ActionSpec"/>
         public abstract ActionSpec ActionSpec { get; }
     }
 }

com.unity.ml-agents/Runtime/Agent.cs

@@ -239,9 +239,11 @@ internal struct AgentParameters
         /// reset and start a new training episode rather than continue to fail.
         /// </remarks>
         /// <example>
+        /// <para>
         /// To use a step limit when training while allowing agents to run without resetting
         /// outside of training, you can set the max step to 0 in <see cref="Initialize"/>
         /// if the <see cref="Academy"/> is not connected to an external process.
+        /// <para>
         /// <code>
         /// using Unity.MLAgents;
         ///