v1.26.2: Papalymo Totolymo: Echo 2

Automatically verify correct parsing of everything in (data). While doing post-release checks on v1.26.1, I discovered that I incorrectly merged (data)/services/updown.yaml in such a way that it became syntactically invalid. This has been mended and multiple layers of CI have been put into place to make sure that (data) entries are syntactically and semantically valid.

What's Changed

• chore(data): fix updown stdlib entry, add CI to catch future things by @Xe in #1771

Full Changelog: v1.26.1...v1.26.2