Summary:
Two documentation errors in `scripts/js-api/README.md`:
1. **Wrong link text** (line 22): The link for the Flow-to-TypeScript converter reads `[flow-api-extractor](https://www.npmjs.com/package/flow-api-translator)` but the package name is `flow-api-translator`, not `flow-api-extractor`. The link URL was correct but the visible text was misleading.
2. **Wrong filename** (line 76): The Public API snapshot section refers to the file as `ReactNative.d.ts`, while the actual file committed to the repo is `ReactNativeApi.d.ts`. The correct name is already used earlier in the same document (line 16 and line 41).
Fixes https://github.com/facebook/react-native/issues/55667
Fixes https://github.com/facebook/react-native/issues/55668
## Changelog:
[General] [Fixed] - Fix incorrect package name and output filename in scripts/js-api/README.md
Pull Request resolved: https://github.com/facebook/react-native/pull/56362
Test Plan: Documentation-only change. Verified the link URL and the actual file name at `packages/react-native/ReactNativeApi.d.ts`.
Reviewed By: huntie
Differential Revision: D100761759
Pulled By: cortinico
fbshipit-source-id: 8a30ca1a5f35c9491c2ad4c94ae20da4621cb5a7