chore: Update to Version 8.15.0

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: rmi22186

mParticle-Appboy.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
     s.name             = "mParticle-Appboy"
-    s.version          = "8.14.1"
+    s.version          = "8.15.0"
     s.summary          = "Appboy integration for mParticle"
 
     s.description      = <<-DESC