fix: rename zhSim alphabet to zh_sim to match HF urls (#690)

## Description

Fixes #680 

### Introduces a breaking change?

- [ ] Yes
- [x] No

### Type of change

- [x] Bug fix (change which fixes an issue)
- [ ] New feature (change which adds functionality)
- [ ] Documentation update (improves or adds clarity to existing
documentation)
- [ ] Other (chores, tests, code style improvements etc.)

### Tested on

- [ ] iOS
- [ ] Android

### Testing instructions

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Include setup details if necessary. -->

### Screenshots

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### Related issues

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### Checklist

- [ ] I have performed a self-review of my code
- [ ] I have commented my code, particularly in hard-to-understand areas
- [ ] I have updated the documentation accordingly
- [ ] My changes generate no new warnings

### Additional notes

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Author: chmjkb

packages/react-native-executorch/src/constants/ocr/models.ts

@@ -76,10 +76,10 @@ const RECOGNIZER_TELUGU_CRNN_256 = createHFRecognizerDownloadUrl('telugu', 256);
 const RECOGNIZER_TELUGU_CRNN_128 = createHFRecognizerDownloadUrl('telugu', 128);
 const RECOGNIZER_TELUGU_CRNN_64 = createHFRecognizerDownloadUrl('telugu', 64);
 
-const RECOGNIZER_ZH_SIM_CRNN_512 = createHFRecognizerDownloadUrl('zhSim', 512);
-const RECOGNIZER_ZH_SIM_CRNN_256 = createHFRecognizerDownloadUrl('zhSim', 256);
-const RECOGNIZER_ZH_SIM_CRNN_128 = createHFRecognizerDownloadUrl('zhSim', 128);
-const RECOGNIZER_ZH_SIM_CRNN_64 = createHFRecognizerDownloadUrl('zhSim', 64);
+const RECOGNIZER_ZH_SIM_CRNN_512 = createHFRecognizerDownloadUrl('zh_sim', 512);
+const RECOGNIZER_ZH_SIM_CRNN_256 = createHFRecognizerDownloadUrl('zh_sim', 256);
+const RECOGNIZER_ZH_SIM_CRNN_128 = createHFRecognizerDownloadUrl('zh_sim', 128);
+const RECOGNIZER_ZH_SIM_CRNN_64 = createHFRecognizerDownloadUrl('zh_sim', 64);
 
 const RECOGNIZER_CYRILLIC_CRNN_512 = createHFRecognizerDownloadUrl(
   'cyrillic',