RFR: 8294074: Make other specs more discoverable from the API docs [v2]

[Mark Reinhold]

On Wed, 30 Jul 2025 17:31:39 GMT, Hannes Wallnöfer <hannesw at openjdk.org> wrote:

>> Please review a doc-only change to the API overview page to make other specs more discoverable. The following sentence is added at the end of the overview text:
>> 
>>> [Related documents](https://cr.openjdk.org/~hannesw/8294074/docs.00/specs/index.html) specify the Java language, the Java virtual machine, various protocols and file formats pertaining to the Java platform, and tools included in the JDK.
>> 
>> The first sentence of the overview text is also rephrased.
>> 
>> The new API overview page [can be viewed here](https://cr.openjdk.org/~hannesw/8294074/docs.00/api/index.html).
>
> Hannes Wallnöfer has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update wording

Marked as reviewed by mr (Lead).

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PR Review: https://git.openjdk.org/jdk/pull/26547#pullrequestreview-3073121679