Remove extra opening bracket (#169)

Author: edrickwong

README.md

@@ -1,6 +1,6 @@
 | Sample/Tool | Status |
 |---------|--------------|
-| All Samples | [[![Build Status](https://mscodehub.visualstudio.com/WindowsAI/_apis/build/status/winml/WinML%20Public%20Samples%20CI%20Build%20(Github-yml)?branchName=master)](https://mscodehub.visualstudio.com/WindowsAI/_build/latest?definitionId=612?branchName=master) |
+| All Samples | [![Build Status](https://mscodehub.visualstudio.com/WindowsAI/_apis/build/status/winml/WinML%20Public%20Samples%20CI%20Build%20(Github-yml)?branchName=master)](https://mscodehub.visualstudio.com/WindowsAI/_build/latest?definitionId=612?branchName=master) |
 | WinmlRunner | [![Build status](https://mscodehub.visualstudio.com/DefaultCollection/WindowsAI/_apis/build/status/winml/WinML%20Dashboard%20CI%20Build)](https://mscodehub.visualstudio.com/DefaultCollection/WindowsAI/_build/latest?definitionId=602) |
 | WinML Dashboard | [![Build status](https://mscodehub.visualstudio.com/DefaultCollection/WindowsAI/_apis/build/status/winml/WinML%20Dashboard%20CI%20Build)](https://mscodehub.visualstudio.com/DefaultCollection/WindowsAI/_build/latest?definitionId=601) |