Add build-essential to README command line install (#1859)

* Add build-essential to README command line install

* Update README.md

Author: will-v-pi

README.md

@@ -51,9 +51,9 @@ You can install the [Raspberry Pi Pico Visual Studio Code extension](https://mar
 These instructions are extremely terse, and Linux-based only. For detailed steps,
 instructions for other platforms, and just in general, we recommend you see [Raspberry Pi Pico-Series C/C++ SDK](https://rptl.io/pico-c-sdk)
 
-1. Install CMake (at least version 3.13), and a GCC cross compiler
+1. Install CMake (at least version 3.13), python 3, a native compiler, and a GCC cross compiler
    ```
-   sudo apt install cmake gcc-arm-none-eabi libnewlib-arm-none-eabi libstdc++-arm-none-eabi-newlib
+   sudo apt install cmake python3 build-essential gcc-arm-none-eabi libnewlib-arm-none-eabi libstdc++-arm-none-eabi-newlib
    ```
 1. Set up your project to point to use the Raspberry Pi Pico SDK
 
@@ -200,4 +200,4 @@ instructions for other platforms, and just in general, we recommend you see [Ras
 
 # RISC-V support on RP2350
 
-See [Raspberry Pi Pico-series C/C++ SDK](https://rptl.io/pico-c-sdk) for information on setting up a build environment for RISC-V on RP2350.
+See [Raspberry Pi Pico-series C/C++ SDK](https://rptl.io/pico-c-sdk) for information on setting up a build environment for RISC-V on RP2350.