RFR: 8344367: Fix mistakes in FX API docs

[Andy Goryachev]

On Sun, 17 Nov 2024 21:35:44 GMT, Nir Lisker <nlisker at openjdk.org> wrote:

> A batch of typo and grammar fixes that were found by the spellchecker.
> 
> Integration can wait until RDP 1/2.

thank you for fixing these errors (from a guy who contributed at least one)!

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

Marked as reviewed by angorya (Reviewer).

PR Review: https://git.openjdk.org/jfx/pull/1642#pullrequestreview-2443041867