Linux LTS: update versions

6.12 is the new LTS, see:
https://www.kernel.org/category/releases.html



Signed-off-by: Dylan Aïssi <dylan.aissi@collabora.com>

static/images/linux_lts_release_roadmap.svg

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+         style="stroke-width:0.26458332">Nov</tspan><tspan
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