fix : typo in props name

[ch3coo2ca]

Issue:

What I did

I fixed typo of wrong props name in react document snippets.
I found that some example snippets take background props and some take backgroundColor props,
so I fixed background to backgroundColor.

How to test

• Is this testable with Jest or Chromatic screenshots?
• Does this need a new example in the kitchen sink apps?
• Does this need an update to the documentation?

If your answer is yes to any of these, please make sure to include it in your PR.

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[jonniebigodes]

@ch3coo2ca thanks for taking the time and effort to help us fix the documentation by catching this small but rather an important typo. We appreciate it. I've checked and all is good on my end. Going to merge this.

Hope you have a great week!

Stay safe