Bump podspec version for OAuth

Author: morganchen12

FirebaseOAuthUI.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = 'FirebaseOAuthUI'
-  s.version      = '12.0.0'
+  s.version      = '12.0.1'
   s.summary      = 'A collection of OAuth providers for FirebaseAuthUI.'
   s.homepage     = 'https://github.com/firebase/FirebaseUI-iOS'
   s.license      = { :type => 'Apache 2.0', :file => 'LICENSE' }