Philadelphia: Fix REST API endpoint

content/english/meetups/philadelphia.md

@@ -2,7 +2,7 @@
 title="Philly's Mailing List"
 date="2024-11-03T12:00:00-08:00"
 description="Receive Handmade meetup invites from the city of brotherly love!"
-api_endpoint="https://api.handmadecities.com/v1/meetups/australia"
+api_endpoint="https://api.handmadecities.com/v1/meetups/philadelphia"
 
 [[hosts]]
 name="Graham Vasquez"