Removed a extra curly braces

[orivelton]

I tried to use the example but we have extra curly braces that I got an error on my code

• [x] briefly describe the changes in this PR
• [ ] write tests for all new functionality
• [x] run npm run docs and commit changes to API.md
• [ ] update CHANGELOG.md with changes under main heading before merging

[wipfli]

@thaddmt