Add new hardware API link

_Sidebar.md

@@ -12,6 +12,7 @@
 - **[The pyb module](http://docs.micropython.org/en/latest/library/pyb.html)**
 - **[[Boards Summary|Boards Summary]]**
 - **[[Hardware Details|Hardware Details]]**
+- **[[New hardware API|Hardware API]]**
 
 ## Micropython on Linux/Mac/Windows
 - **[[Installation|Getting Started]]**
@@ -27,4 +28,4 @@
 - **[[Contributor Guidelines|ContributorGuidelines]]**
 - **[[Development Workflow|DevelWorkflow]]**
 - **[[micropython Internals|Internals]]**
-- **[[ARM Toolchain|Getting Started STM]]**
+- **[[ARM Toolchain|Getting Started STM]]**