RFR: 7903802: apidiff: minor doc and related updates

[Jonathan Gibbons]

On Fri, 23 Aug 2024 19:13:36 GMT, Iris Clark <iris at openjdk.org> wrote:

>> Please review some minor doc changes for apidiff
>
> src/share/doc/apidiff.md line 26:
> 
>> 24: 
>> 25: title: 'APIDIFF(1) 1.0 | CodeTools'
>> 26: date: 2024
> 
> Suggest you update the copyright year on line 3 too.

Thank you; will do.

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PR Review Comment: https://git.openjdk.org/apidiff/pull/4#discussion_r1729586111