fix: content fix

[honorsuper]

What does it do?

If the content in the props is empty, an exception will occur.

Why is it needed?

Before the data is returned, if content is empty, an exception will occur.

[oiorain]

Hi there!
Thank you for your contribution!
Could you give a little more context on what fix you're bringing and what your contribution is?

Thank you

[honorsuper]

Hi there! Thank you for your contribution! Could you give a little more context on what fix you're bringing and what your contribution is?

Thank you

In the file BlocksRenderer.tsx，

The value of the content property is fetched from an API. If the data is not returned, it will be undefined. In this case, calling props.content.map will throw an exception，「Cannot read properties of undefined (reading 'map')」，So, what I have done is adding the Optional Chaining Operator to solve this issue
@oiorain