RFR: 8285306: Fix typos in java.desktop [v10]

[Alexey Ivanov]

On Thu, 22 Sep 2022 17:21:05 GMT, SWinxy <duke at openjdk.org> wrote:

>> Please submit a new JBS issue for it if you can; if you can't, I can submit one on your behalf.
>> 
>> Possibly it meant to say “_the_ theme”.
>
> I unfortunately don't have a JBS (yet..), so if you could, that would be amazing.

I think the text is correct here: …that _**a** Theme_ can support

`MetalTheme` is a superclass for classes which implement Themes. Thus the constants define fonts which _a particular theme_ may use.

-------------

PR: https://git.openjdk.org/jdk/pull/8328