chore: replace QLoRa model with SpinQuant one (#493)

## Description

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implemented in this PR. -->

### Introduces a breaking change?

- [ ] Yes
- [ ] No

### Type of change

- [ ] 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. -->

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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

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Author: chmjkb

apps/llm/app/llm/index.tsx

@@ -12,7 +12,7 @@ import {
 } from 'react-native';
 import SendIcon from '../../assets/icons/send_icon.svg';
 import Spinner from 'react-native-loading-spinner-overlay';
-import { useLLM, LLAMA3_2_1B_QLORA } from 'react-native-executorch';
+import { useLLM, LLAMA3_2_1B_SPINQUANT } from 'react-native-executorch';
 import PauseIcon from '../../assets/icons/pause_icon.svg';
 import ColorPalette from '../../colors';
 import Messages from '../../components/Messages';
@@ -30,7 +30,7 @@ function LLMScreen() {
   const textInputRef = useRef<TextInput>(null);
   const { setGlobalGenerating } = useContext(GeneratingContext);
 
-  const llm = useLLM({ model: LLAMA3_2_1B_QLORA });
+  const llm = useLLM({ model: LLAMA3_2_1B_SPINQUANT });
 
   useEffect(() => {
     if (llm.error) {