chore(doc): typo & formatting

README.md

@@ -39,8 +39,11 @@ This application written in C does:
 ## Installation
 
   1. Install a Linux compatible distro on your device.
-     With *RasberryPi* devices, use a kernel *4.x ONLY*. There is a know bug related to later version 5.x.
+
+     With **RasberryPi** devices, use a kernel **4.x ONLY**. There is a know bug related to later version 5.x.
+
      You can use this image : https://downloads.raspberrypi.org/raspbian_lite/images/raspbian_lite-2019-04-09/
+
      Update your OS as usual:
      ```bash
      sudo apt-get update && sudo apt-get upgrade
@@ -85,7 +88,7 @@ Some manufacturers intergrate a 0.5ppm TCXO. It's the best second option, after
 - RTL-SDR Blog 1PPM TCXO : Works with some drift, require additional mass, or a better enclosure
 - Other no-name like : RT820, E4000, FC0012, FC0013, can work, but require modification and drift a lot
 
-## OS & Linux kernel requirement for RasperryPi devices
+## OS & Linux kernel requirement for RaspberryPi devices
 
 I have no idea why this app works fine for RPi with a kernel 4.x and not 5.x. Using a x86_64, rtlsdr-wsprd works perfectly fine with both versions of the kernel. This is probably related to an issue with pthread, and I have to investinage this point.
 If you have some knowledge about this, your help is welcome!!