fix(hsv): name rgb2hsv converter correctly

[xianjianlf2]

What changed

Rename the internal converter function in src/io/hsv/rgb2hsv.js from rgb2hsl to rgb2hsv.

Why

The file implements and exports RGB-to-HSV conversion, but the local function name still said rgb2hsl. This is confusing when reading stack traces, debugging, or navigating the source, and it was reported in #363.

Fixes #363

Validation

• npm test -- test/io/rgb2hsv.test.js --run
• pre-commit ran npm run lint and full npm test successfully: 50 test files, 2519 tests

[changeset-bot]

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