RFR: 1102: Document minimum required JDK version 16 for Skara [v2]

[Iris Clark]

On Wed, 7 Jul 2021 20:20:52 GMT, Iris Clark <iris at openjdk.org> wrote:

>> Erik Joelsson has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Update example
>
> README.md line 49:
> 
>> 47: ## Building
>> 48: 
>> 49: [JDK 16](http://jdk.java.net/16/) or later and [Gradle](https://gradle.org/)
> 
> How often is the minimum JDK version for Skara updated?  If it's always the last GA'd version of the JDK, perhaps that sort of phrasing should be used instead?

Thanks for the explanation:  https://mail.openjdk.java.net/pipermail/skara-dev/2021-July/005097.html

I agree that the JDK version needs to remain explicit.

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PR: https://git.openjdk.java.net/skara/pull/1195