update yaml headers

Author: conceptdev

BindingSample/README.md

@@ -1,6 +1,6 @@
 ---
 name: Xamarin.iOS - Xamarin.iOS Binding Sample
-description: This example shows how we can utilize an existing Objective-C library and expose it for use in a Xamarin.iOS project. For instance, you may have...
+description: "Shows how to utilize an existing Objective-C library and expose it for use in a Xamarin.iOS project"
 page_type: sample
 languages:
 - csharp

Contacts/README.md

@@ -1,6 +1,6 @@
 ---
-name: 'Xamarin.iOS - Contacts: Using ContactsUI View Controllers and Properties'
-description: This sample is a set of sample code that demonstrates how to use ContactsUI view controllers and properties. Build Requirements Xcode 9.0 or later;...
+name: 'Xamarin.iOS - Contacts using ContactsUI'
+description: 'This sample is a set of sample code that demonstrates how to use ContactsUI view controllers and properties'
 page_type: sample
 languages:
 - csharp
@@ -10,7 +10,7 @@ urlFragment: contacts
 ---
 # Contacts: Using ContactsUI View Controllers and Properties
 
-This sample is a set of sample code that demonstrates how to use ContactsUI view controllers and properties.
+Sample code that demonstrates how to use ContactsUI view controllers and properties.
 
 ![Home Screen](Screenshots/screenshot-1.png)
 
@@ -26,7 +26,3 @@ Xcode 9.0 or later; iOS 10.3 SDK or later
 ## License
 
 Xamarin port changes are released under the MIT license.
-
-## Author
-
-Ported to Xamarin.iOS by Mykyta Bondarenko

Keychain/README.md

@@ -1,6 +1,6 @@
 ---
 name: Xamarin.iOS - Keychain
-description: An example using Apple's keychain storage for storing information securely within an application.
+description: "An example using Apple's keychain storage for storing information securely within an application."
 page_type: sample
 languages:
 - csharp

MultichannelMixer/README.md

@@ -1,6 +1,6 @@
 ---
 name: Xamarin.iOS - iPhone Multichannel Mixer test
-description: "Demonstrates how to build an Audio Unit Graph connecting a Multichannel Mixer instance to the RemoteIO unit. Two input busses are created #ios6"
+description: "Demonstrates how to build an Audio Unit Graph connecting a Multichannel Mixer instance to the RemoteIO unit. Two input busses are created (iOS6)"
 page_type: sample
 languages:
 - csharp