RFR: Updates to the JBS section of the OpenJDK Dev Guide [v13]

[Jesper Wilhelmsson]

On Wed, 24 May 2023 18:31:03 GMT, calnan <duke at openjdk.org> wrote:

>> Added overview on triaging issues, the bug states and process.
>
> calnan has updated the pull request incrementally with one additional commit since the last revision:
> 
>   changed label from 'cleanup' vs. 'noreg-cleanup'

Marked as reviewed by jwilhelm (Lead).

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PR Review: https://git.openjdk.org/guide/pull/100#pullrequestreview-1444528732