Fixup: Script casing

Co-authored-by: Andy Jordan <[email protected]>

Author: JustinGrote

PowerShellEditorServices.build.ps1

@@ -309,7 +309,7 @@ Task BuildIfChanged -Inputs {
     './src/PowerShellEditorServices.Hosting/bin/Debug/net8.0/Microsoft.PowerShell.EditorServices.Hosting.dll'
 } -Jobs {
     Write-Build DarkMagenta 'Changes detected, rebuilding'
-    $SCRIPT:ChangesDetected = $true
+    $script:ChangesDetected = $true
 }, Build
 
 Task Test TestPS74, TestE2EPwsh, TestPS51, TestE2EPowerShell