[Bug] `templateExportDefault: true` does not add `export default` correctly

[davidtaylorhq]

When templateExportDefault: true, I would expect this gjs file:

<template>Hello world</template>

to be transformed to

export default <template>Hello world</template>

However, this does not happen. The file remains unchanged.

This issue is also shown in the snapshot tests in this repo:

prettier-plugin-ember-template-tag/tests/unit-tests/config/__snapshots__/template-export-default.test.ts.snap

Lines 278 to 281 in 0ceae89

	exports[`config > templateExportDefault: true > it formats ../cases/gjs/simple.gjs 1`] = `
	"<template>what</template>
	"
	`;

^^ this assertion should be export default <template>what</template>

🌍 Environment

• prettier-plugin-ember-template-tag version: 2.1.0