README: Fix not working a link to "supported board and emulator"
Sub-title was changed to "Supported Board / Emulator" but link is not.
Because of that, link is not working. Fix it to current name.
@@ -9,7 +9,7 @@ Please find project details like APIs reference at [docs](docs/) folder. Wiki wi
## Contents
> [Quick Start](#quick-start)
-> [Supported Board](#supported-board)
+> [Supported Board / Emulator](#supported-board--emulator)
> [Configuration Sets](#configuration-sets)
## Quick Start
