Slight issue in formatted code with ObjectLiteralExpression.addPropertyAssignment()

**Describe the bug**

Trying to add a property assignment to an object literal which exists inside of a CallExpression, but seems the formatting gets an extra level of indentation when doing so.

Version: 6.0.2

**To Reproduce**

```ts
import { Project, SyntaxKind } from 'ts-morph';

const project = new Project();
const sourceFile = project.createSourceFile('test.ts', `
const obj = doSomething({});
`);

const objLiteral = sourceFile.getDescendantsOfKind(SyntaxKind.ObjectLiteralExpression)[0];
objLiteral.addPropertyAssignment({
name: 'myProp',
initializer: '42'
});

console.log('sourceFile: ', sourceFile.getFullText());
```

**Expected behavior**

Would expect the output source file to be formatted as:

```ts
const obj = doSomething({
myProp: 42
});
```

However it ends up being formatted as:

```ts
const obj = doSomething({
myProp: 42
});
```

Start with the TypeScript reproduction in the issue and trace ObjectLiteralExpression.addPropertyAssignment() when the object literal is inside a CallExpression. Compare sourceFile.getFullText() with the expected output; done means the added property and closing delimiter use the shown indentation without the extra level.

Written by the indexing model from the issue text.