development: updated podspec social media URL

Material.podspec

@@ -4,7 +4,7 @@ Pod::Spec.new do |s|
   s.license = 'BSD-3-Clause'
   s.summary = 'An animation and graphics framework for Material Design in Swift.'
   s.homepage = 'http://cosmicmind.io'
-  s.social_media_url = 'https://www.facebook.com/graphkit'
+  s.social_media_url = 'https://www.facebook.com/cosmicmindio'
   s.authors = { 'CosmicMind, Inc.' => 'support@cosmicmind.io' }
   s.source = { :git => 'https://github.com/CosmicMind/Material.git', :tag => s.version }
   s.ios.deployment_target = '8.0'