Explain the Web of Trust verification using a drawing
Originally created by @sajolida on #11337 (Redmine)
This used to be in /doc/get/trusting_tails_signing_key.mdwn and will now be in /install/inc/steps/openpgp.inline.mdwn. You can see this by navigating to https://tails.boum.org/install/download#openpgp and clicking on “Read more about authenticating the Tails signing key through the OpenPGP Web of Trust.”
In addition to the Alice and Bob scenario, making a drawing for this would make it easier to grasp.