RFR: Section about the release process [v3]

[Jesper Wilhelmsson]

On Thu, 12 Aug 2021 00:42:46 GMT, Stuart Marks <smarks at openjdk.org> wrote:

>> Jesper Wilhelmsson has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Updates after review
>
> Updated changes all look good, thanks.

Thank you for your reviews @stuart-marks!

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PR: https://git.openjdk.java.net/guide/pull/62