README.md: fix default features (#130)

Author: newAM

README.md

@@ -26,7 +26,7 @@ for version 0.x is enabled.  To enable support for version 1.x, use the `eh1` fe
 
 There are currently the following cargo features:
 
-- `eh0`: Provide module `eh0` that mocks embedded-hal version 0.x (enabled by default)
+- `eh0`: Provide module `eh0` that mocks embedded-hal version 0.x
 - `eh1`: Provide module `eh1` that mocks embedded-hal version 1.x (enabled by default)
 - `embedded-time`: Enable the `eh0::timer` module (enabled by default)
 - `embedded-hal-async`: Provide mocks for embedded-hal-async in `eh1`