Merge pull request microsoft#251534 from liuxingbaoyu/fix-251478

fix: PowerShell not working with username having Unicode

Author: Tyriar

src/vs/platform/shell/node/shellEnv.ts

@@ -139,7 +139,7 @@ async function doResolveShellEnv(logService: ILogService, token: CancellationTok
 		// Older versions of PowerShell removes double quotes sometimes
 		// so we use "double single quotes" which is how you escape single
 		// quotes inside of a single quoted string.
-		command = `Write-Output '${mark}'; [System.Environment]::GetEnvironmentVariables() | ConvertTo-Json -Compress; Write-Output '${mark}'`;
+		command = `chcp 65001; Write-Output '${mark}'; [System.Environment]::GetEnvironmentVariables() | ConvertTo-Json -Compress; Write-Output '${mark}'`;
 
 		// -Login is not a supported argument on PowerShell 5, which is a version of
 		// powershell that is exclusive to Windows. Providing it would error. Also,