Avoid use of inline in doc/first_steps/upgrade

I found a way to avoid use of inline in doc/first_steps/upgrade page (see #12246 (closed)): I replace inline imbrication by a link to a page who show the latest news/version_*.

This solution works in my computer, this page is translatable in all languages without bug. And in bonus it remove a step at each release, no need to update stable_amd64_release_notes anymore.

Feature Branch: xin:fix_inline_problem

Related issues

Related to #12246 (closed)
Blocks #13423 (closed)

Original created by @xin on 13341 (Redmine)

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