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Use language branding

Author: eps1lon

docs/react-testing-library/setup.mdx

@@ -155,8 +155,8 @@ elements by `data-cy`, a "test ID" convention mentioned in the
 [Cypress.io](https://docs.cypress.io/guides/references/best-practices.html#Selecting-Elements)
 documentation.
 
-  <Tabs groupId="test-utils" defaultValue="js" values={[ {label: 'Javascript',
-  value: 'js'}, {label: 'Typescript', value: 'ts'}, ]}>
+  <Tabs groupId="test-utils" defaultValue="js" values={[ {label: 'JavaScript',
+  value: 'js'}, {label: 'TypeScript', value: 'ts'}, ]}>
 
   <TabItem value="js">