feat: bump up sdk version

Author: plutoless

windows/APIExample/install.ps1

@@ -1,6 +1,6 @@
 $ThirdPartysrc = 'https://agora-adc-artifacts.oss-cn-beijing.aliyuncs.com/libs/ThirdParty.zip'
 $ThirdPartydes = 'ThirdParty.zip'
-$agora_sdk = 'https://download.agora.io/sdk/release/Agora_Native_SDK_for_Windows_v4.0.0-beta.1_FULL.zip'
+$agora_sdk = 'https://download.agora.io/sdk/release/Agora_Native_SDK_for_Windows_v4.0.0-beta.2_FULL.zip'
 $agora_des = 'AgoraSdk.zip'
 
 if (-not (Test-Path ThirdParty)){