Ubuntu apt key location
In https://support.1password.com/install-linux/ , 1Password suggests to install 1Password's apt key in `/usr/share/keyrings/`. However, in Ubuntu, `/usr/share/keyrings/` is considered as a location for system-managed and package-system-managed apt keys.
For this kind of manual installation, `/etc/apt/keyrings/` should be recommended, IIUC. What do you think about updating the document?
