Clarify updated release process requirements for USB image

Originally created by @intrigeri on #16163 (Redmine)

e42cd0fa says “XXX: Adapt this section to also generate” (emphasis mine). I’m working on this as part of #15999 (closed) and I’m not sure about “also”: do you mean we need to keep generating files with the old names, e.g. inc/stable_amd64_gpg_signature_output.html? If yes, will you need those files forever or is there a plan to deprecate them?

Thanks in advance!

Parent Task: #16006 (closed)

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Edited by intrigeri
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