RFR: 8292566: Add reference to the java.nio.file package in java.nio package documentation [v3]

[Alan Bateman]

On Fri, 19 Aug 2022 15:19:00 GMT, Brian Burkhalter <bpb at openjdk.org> wrote:

>> Add a phrase about `java.nio.file` to the sentence in the `java.nio` package documentation describing its subpackages.
>
> Brian Burkhalter has updated the pull request incrementally with one additional commit since the last revision:
> 
>   8292566: Reduce central abstractions to Path and Files

Update looks good.

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Marked as reviewed by alanb (Reviewer).

PR: https://git.openjdk.org/jdk/pull/9910