RFR: 8367787: Expand use of representation equivalence terminology in Float16

[Paul Sandoz]

On Tue, 16 Sep 2025 20:33:00 GMT, Joe Darcy <darcy at openjdk.org> wrote:

> Analogous to recent updates made in Float and Double, along with a double -> Float16 typo fix.

Marked as reviewed by psandoz (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/27322#pullrequestreview-3236127418