msi_z690/building.md: sync with the msi_z690/building branch

Signed-off-by: Maciej Pijanowski <maciej.pijanowski@3mdeb.com>

docs/variants/msi_z690/building-manual.md

@@ -1 +0,0 @@
-# Dasharo compatible with MSI PRO Z690-A WIFI DDR4 - building manual

docs/variants/msi_z690/building.md

@@ -8,16 +8,17 @@ compatible with MSI PRO Z690-A WIFI DDR4.
 ## Requirements
 
 * `Ubuntu 20.04 LTS` as a host OS
-* Docker
+* Internet connection
+* Docker installed
     - follow [Install Docker Engine on Ubuntu](https://docs.docker.com/engine/install/ubuntu/)
     - follow [Post-installation steps for Linux](https://docs.docker.com/engine/install/linux-postinstall/)
-* Git
+* Git, wget, unzip installed
 
 ```bash
-sudo apt install git
+sudo apt install git  unzip wget
 ```
 
-* UEFIExtract
+* UEFIExtract installed
 
 ```bash
 $ sudo apt install wget
@@ -43,7 +44,6 @@ Navigate to the source code directory and start the build process:
 
 ```bash
 $ cd coreboot
-$ git submodule update --init --recursive --checkout
 $ ./build.sh build
 ```