Update Health script text

Standardize Azure MFA NPS Extension link as same reference on doc https://learn.microsoft.com/en-us/azure/active-directory/authentication/howto-mfa-nps-extension-errors#health-check-script

Author: miguel-s-ferreira

articles/active-directory/authentication/howto-mfa-nps-extension.md

@@ -330,9 +330,7 @@ You can choose to create this key and set it to *FALSE* while your users are onb
 
 ### NPS extension health check script
 
-The following script is available to perform basic health check steps when troubleshooting the NPS extension.
-
-[MFA_NPS_Troubleshooter.ps1](/samples/azure-samples/azure-mfa-nps-extension-health-check/azure-mfa-nps-extension-health-check/)
+The [Azure AD MFA NPS Extension health check script](/samples/azure-samples/azure-mfa-nps-extension-health-check/azure-mfa-nps-extension-health-check/) performs a basic health check when troubleshooting the NPS extension. Run the script and choose one of available options.
 
 ### How to fix the error "Service principal was not found" while running `AzureMfaNpsExtnConfigSetup.ps1` script?