added new sponsors

Author: hlmuludiang

data/events/2025/philadelphia/main.yml

@@ -90,6 +90,10 @@ sponsors:
   # - id: samplesponsorname
   # level: gold
   #  url: http://mysponsor.com/?campaign=me # Use this if you need to over-ride a sponsor URL.
+  - id: appfire
+    level: platinum
+  - id: launchdarkly
+    level: platinum
   - id: flox
     level: gold
     url: https://flox.dev/