RFR: 8309602: update JVMTI history table for jdk 21 [v4]

[Serguei Spitsyn]

On Thu, 8 Jun 2023 04:01:56 GMT, Serguei Spitsyn <sspitsyn at openjdk.org> wrote:

>> This is a minor update of the `jvmti.xml` file.
>> The JVM TI history table needs to be updated to list:
>>  - Virtual threads finalized to be a permanent feature.
>>  - Agent start-up in the live phase now specified to print a warning.
>> 
>> The JVM TI history table has no normative changes. This update does not need a CSR.
>
> Serguei Spitsyn has updated the pull request incrementally with one additional commit since the last revision:
> 
>   improved formatting in the jvmti.xml history table

Alan and Iris, thank you for review!

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PR Comment: https://git.openjdk.org/jdk/pull/14352#issuecomment-1581857901