[Merge] ~waveform/meta-release:pi500 into meta-release:main

[Dave Jones]

Huh, apparently this needs rebasing on the core-docs branch -- I thought that'd been merged already, but apparently not.
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https://code.launchpad.net/~waveform/meta-release/+git/meta-release/+merge/478085
Your team Ubuntu Core Development Team is requested to review the proposed merge of ~waveform/meta-release:pi500 into meta-release:main.