RFR: 8292911: Add a note about jtreg failure handlers in the testing doc

[Erik Joelsson]

On Fri, 26 Aug 2022 06:04:14 GMT, Jaikiran Pai <jpai at openjdk.org> wrote:

> > Inside Oracle, if you configure using Jib you should get the same version of pandoc that was used to generate the existing html files.
> 
> I gave that a try (and verified that it uses the jib installed pandoc), but it still ends up generating way too many changes on existing untouched content. I did however, let it generate that content and then manually copied over only the lines of interest in this PR.

That's strange. I have just verified this on both Macos and Linux, and I get zero spurious changes from `make update-build-docs`.

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PR: https://git.openjdk.org/jdk/pull/10021