Update use of "PowerShell Core" to just "PowerShell" (#9513)

test/powershell/Modules/Microsoft.PowerShell.Core/CompatiblePSEditions.Module.Tests.ps1

@@ -348,7 +348,7 @@ Describe "PSModulePath changes interacting with other PowerShell processes" -Tag
             $errors | Should -Be $null
         }
 
-        It "Allows PowerShell Core 6 subprocesses to call core modules" {
+        It "Allows PowerShell subprocesses to call core modules" {
             $errors = pwsh.exe -Command "Get-ChildItem" 2>&1 | Where-Object { $_ -is [System.Management.Automation.ErrorRecord] }
             $errors | Should -Be $null
         }