update wiki

Author: cuu

wiki/Setting-Up-the-Pico-SDK-on-Linux-for-Pico-Development.md

@@ -22,7 +22,7 @@ Navigate to a workspace directory and clone the official Raspberry Pi Pico SDK:
 
 ```bash
 mkdir -p ~/pico && cd ~/pico
-git clone -b master https://github.com/raspberrypi/pico-sdk.git
+git clone https://github.com/raspberrypi/pico-sdk.git
 cd pico-sdk
 git checkout tags/2.0.0 -b sdk2.0.0
 git submodule update --init