GPG Public Key expired?

[divi]

$ curl -fsS https://dlang.org/install.sh | bash -s dmd
Downloading and unpacking 
http://downloads.dlang.org/releases/2.x/2.092.0/dmd.2.092.0.linux.tar.xz
######################################################################## 100.0%
gpg: checking the trustdb
gpg: marginals needed: 3  completes needed: 1  trust model: pgp
gpg: depth: 0  valid:   1  signed:   0  trust: 0-, 0q, 0n, 0m, 
0f, 1u
gpg: next trustdb check due at 2022-03-12
gpg: Signature made Mon 11 May 2020 16:54:29 BST
gpg:                using RSA key 
3AAF1A18E61F6FAA3B7193E4DB8C5218B9329CF8
gpg: Can't check signature: No public key
Invalid signature 
http://downloads.dlang.org/releases/2.x/2.092.0/dmd.2.092.0.linux.tar.xz.sig