Add GPG De-Armor From Jitsi

Jitsi meet provided the one liner to accept an armored GPG key and
create the gpg file from it.

gpg-dearmor.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+
+# De-ASCII Armor GPG key
+# https://jitsi.github.io/handbook/docs/devops-guide/devops-guide-quickstart
+# e.g.
+# curl https://download.jitsi.org/jitsi-key.gpg.key | sudo sh -c 'gpg --dearmor > /usr/share/keyrings/jitsi-keyring.gpg'
+
+cat $1 | gpg --dearmor