prettier plugin: Infinite loop for malformed graphql relay query

## Bug Description

The following code hangs forever:

```js
const prettier = require('@prettier/sync');
const prettierOptions = {
plugins: ['prettier-plugin-hermes-parser'],
};
const code = `// @flow strict
function App() {
const data = useLazyLoadQuery(graphql\`query AppQuery {} \`, {})
}
`;

for (let i = 0; i < 4; ++i) {
console.log(
prettier.format(code, { ...prettierOptions, parser: 'hermes' }).trim()
);
}
```

Hermes git revision (if applicable): `"prettier-plugin-hermes-parser": "0.19.2",`

## The Expected Behavior

Don't have infinite loops