Add installation command for the missing packages in debian

[TNTBOMBOM]

https://github.com/Vitexus/FirefoxNightlyDeb#installation

checking here:

sudo wget -O /etc/apt/trusted.gpg.d/vitexsoftware.gpg http://repo.vitexsoftware.cz/keyring.gpg

wget is not installed by default in debian, and i saw that later in the installation process it need bzip2 package which is as well not installed by default.

with apt-transport-https package mentioned here #12 the commands will be:

sudo apt install wget apt-transport-https bzip2
echo "deb https://repo.vitexsoftware.cz default main" | sudo tee /etc/apt/sources.list.d/vitexsoftware.list
sudo wget -O /etc/apt/trusted.gpg.d/vitexsoftware.gpg https://repo.vitexsoftware.cz/keyring.gpg

[Vitexus]

Instructions was updated