Change Max Player Count error type to warning - ISXB-719 (#1828)

* Change Max Player Count error type to warning

Author: Pauliusd01

Packages/com.unity.inputsystem/CHANGELOG.md

@@ -12,6 +12,7 @@ however, it has to be formatted properly to pass verification tests.
 
 ### Changed
 - From 2023.2 forward: UI toolkit now uses the "UI" action map of project-wide actions as their default input actions. Previously, the actions were hardcoded and were based on `DefaultInputActions` asset which didn't allow user changes. Also, removing bindings or renaming the 'UI' action map of project wide actions will break UI input for UI toolkit.
+- Changed the 'Max player count reached' error to a warning instead.
 
 ### Added
 - Added new methods and properties to [`InputAction`](xref:UnityEngine.InputSystem.InputAction):

Packages/com.unity.inputsystem/InputSystem/Plugins/PlayerInput/PlayerInputManager.cs

@@ -501,7 +501,7 @@ private bool CheckIfPlayerCanJoin(int playerIndex = -1)
 
             if (m_MaxPlayerCount >= 0 && playerCount >= m_MaxPlayerCount)
             {
-                Debug.LogError("Have reached maximum player count of " + maxPlayerCount, this);
+                Debug.LogWarning("Maximum number of supported players reached: " + maxPlayerCount, this);
                 return false;
             }