Use encoded x3a to represent colon in pwsh

Author: Tyriar

src/vs/workbench/contrib/terminal/browser/media/shellIntegration.ps1

@@ -25,23 +25,23 @@ if ($env:VSCODE_ENV_REPLACE) {
 	$Split = $env:VSCODE_ENV_REPLACE.Split(":")
 	foreach ($Item in $Split) {
 		$Inner = $Item.Split('=')
-		[Environment]::SetEnvironmentVariable($Inner[0], $Inner[1])
+		[Environment]::SetEnvironmentVariable($Inner[0], $Inner[1].Replace('\x3a', ':'))
 	}
 	$env:VSCODE_ENV_REPLACE = $null
 }
 if ($env:VSCODE_ENV_PREPEND) {
 	$Split = $env:VSCODE_ENV_PREPEND.Split(":")
 	foreach ($Item in $Split) {
 		$Inner = $Item.Split('=')
-		[Environment]::SetEnvironmentVariable($Inner[0], $Inner[1] + [Environment]::GetEnvironmentVariable($Inner[0]))
+		[Environment]::SetEnvironmentVariable($Inner[0], $Inner[1].Replace('\x3a', ':') + [Environment]::GetEnvironmentVariable($Inner[0]))
 	}
 	$env:VSCODE_ENV_PREPEND = $null
 }
 if ($env:VSCODE_ENV_APPEND) {
 	$Split = $env:VSCODE_ENV_APPEND.Split(":")
 	foreach ($Item in $Split) {
 		$Inner = $Item.Split('=')
-		[Environment]::SetEnvironmentVariable($Inner[0], [Environment]::GetEnvironmentVariable($Inner[0]) + $Inner[1])
+		[Environment]::SetEnvironmentVariable($Inner[0], [Environment]::GetEnvironmentVariable($Inner[0]) + $Inner[1].Replace('\x3a', ':'))
 	}
 	$env:VSCODE_ENV_APPEND = $null
 }