[Tests] `prop-types`: fix a typo in a test case
[Tests] `prop-types`: fix a typo in a test case

 - https://github.com/eslint/eslint/issues/15234

 - https://github.com/typescript-eslint/typescript-eslint/issues/4072

 - https://github.com/babel/babel/issues/13903

yannickcr/eslint-plugin-react