chore(geofence): sync LocationGeofence podspec to 4.6.0

Feature-only podspec isn't touched by the release automation that bumped the
rest to 4.6.0 on main, so it lagged at 4.5.3 and fails the CocoaPods CI.

Author: mrehan27

CustomerIOLocationGeofence.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |spec|
   spec.name         = "CustomerIOLocationGeofence"
-  spec.version      = "4.5.3" # Don't modify this line - it's automatically updated
+  spec.version      = "4.6.0" # Don't modify this line - it's automatically updated
   spec.summary      = "Official Customer.io SDK for iOS - Location Geofence Module"
   spec.homepage     = "https://github.com/customerio/customerio-ios"
   spec.documentation_url = 'https://customer.io/docs/sdk/ios/'