Warning: apt-key is deprecated in Ubuntu 22.04.1 LTS

[FX-Muesli]

Manage keyring files in trusted.gpg.d instead.

I would suggest the following enhancement:
Changing line 65 from:
print_pgp_key | apt-key add -
to:
print_pgp_key | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/metasploit-framework.gpg
Maybe omit the tee, as the output is not really usefull.
See also: https://opensource.com/article/22/9/deprecated-linux-apt-key

[Crazyhead90]

Created a pull request to solve this issue (in ubuntu 22.04):
#192