Disable WebGL MetaMask extension in Playground scene

Set WebglForceMetamaskExtension to 0 in Scene_Playground.unity to prevent forcing the MetaMask extension in WebGL builds.

Author: 0xFirekeeper

Assets/Thirdweb/Examples/Scenes/Scene_Playground.unity

@@ -2888,7 +2888,7 @@ MonoBehaviour:
   m_Name: 
   m_EditorClassIdentifier: 
   ActiveChainId: 84532
-  WebglForceMetamaskExtension: 1
+  WebglForceMetamaskExtension: 0
   ConnectWalletPanel: {fileID: 974997944}
   PrivateKeyWalletButton: {fileID: 736464798}
   EcosystemWalletButton: {fileID: 1496910716}