No pub key

[desktopss]

On
#sudo apt update,

I'm seeing


Hit:1 https://deb.debian.org/debian buster InRelease
Get:2 https://dl.winehq.org/wine-builds/debian buster InRelease [6,259 B]
Get:3 https://deb.debian.org/debian-security buster/updates InRelease [65.4 kB]
Get:4 https://deb.debian.org/debian buster/main i386 Packages [7,862 kB]
Err:2 https://dl.winehq.org/wine-builds/debian buster InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 76F1A20FF987672F
Hit:5 https://deb.qubes-os.org/r4.0/vm buster InRelease
Get:6 https://deb.debian.org/debian buster/contrib i386 Packages [46.9 kB]
Get:7 https://deb.debian.org/debian buster/non-free i386 Packages [76.3 kB]
Get:8 https://deb.debian.org/debian-security buster/updates/main i386 Packages [196 kB]
Get:9 https://deb.debian.org/debian-security buster/updates/non-free i386 Packages [556 B]
Reading package lists... Done
W: GPG error: https://dl.winehq.org/wine-builds/debian buster InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 76F1A20FF987672F
E: The repository 'https://dl.winehq.org/wine-builds/debian buster InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.


So I wasn't sure it was good to use it. How can I get the pub key for this. What should I do?

[dimesio]

Follow the instructions on https://wiki.winehq.org/Debian.