Revise intro text for contacting support

“I made this small improvement with help from Copilot, which guided me through my first contribution.”

Author: vortsghost2025

content/support/contacting-github-support/index.md

@@ -1,7 +1,7 @@
 ---
 title: Contacting GitHub Support
 shortTitle: Contacting support
-intro: 'You can use the {% data variables.contact.landing_page_portal %} to contact GitHub Support for help troubleshooting issues you encounter while using GitHub.'
+intro: “Use the support portal to contact GitHub Support when you need help troubleshooting issues.”
 versions:
   fpt: '*'
   ghec: '*'