MHZ -> MHz

Author: autowp

README.md

@@ -12,7 +12,7 @@ Implement communication with CAN bus via MCP2515 by CanHacker (lawicel) protocol
 - supports filter by ID (mask + code)
 - interface using [Stream](https://www.arduino.cc/en/Reference/Stream): ability to work with Serial, SoftwareSerial, Ethernet and other
 - supported can baudrates from 10Kbps up to 1Mbps
-- supported modules with different oscillators (8, 16, 20 MHZ), 16 MHZ is default, use setClock if your oscillator is not 16MHZ
+- supported modules with different oscillators (8, 16, 20 MHz), 16 MHz is default, use setClock if your oscillator is not 16MHz
 - support [CanHacker](http://www.mictronics.de/projects/usb-can-bus/) (application for Windows)
 - support [CANreader](https://github.com/autowp/CANreader) (application for Android)
 
@@ -34,4 +34,4 @@ On Arduino Uno have problem with too long boot period and losing first command
 
 ## Contributing
 
-Feel free to open issues, create pull requests and other contributions
+Feel free to open issues, create pull requests and other contributions