fix(Tree): Fixed Tree indent bug (#2651)
fix(Tree): Fixed Tree indent bug (#2651)

When built, `TreeItemContent` did not properly call the `generateIndent` function which led to `Tree / TreeItem`s from indenting properly. Calling the function explicitly in a wrapper arrow function resolves this behavior.

## Developer Checklist [ℹ️](https://github.com/looker-open-source/components/blob/main//CONTRIBUTING.md#developer-checklist)

- [ ] ♿️ Accessibility addressed
- [ ] 🌏 Localization & Internationalization addressed
- [ ] 🖼 Image Snapshot coverage
- [ ] 📚 Documentation updated
- [ ] 🧳 Bundle size impact addressed
- [ ] 🏁 Performance impacts addressed
- [ ] 👾 Browsers tested
  - [ ] Chrome
  - [ ] Firefox
  - [ ] Safari
  - [ ] IE11

looker-open-source/components,looker-open-source/components,looker-open-source/components,looker-open-source/components