docs(develop): fix syntax (#5100)

Author: kmcfaul

packages/documentation-site/patternfly-docs/content/get-started/develop.md

@@ -94,7 +94,7 @@ PatternFly uses the [`@patternfly/react-styles` package](https://www.npmjs.com/p
 import '@patternfly/react-core/dist/styles/base.css';
 ```
 
-Importing css directly from the PatternFly HTML/CSS library while using PatternFly React may result in duplicated stylesheets in the browser as PatternFly React already pulls in styles internally via `@patternfly/react-styles`.
+Importing CSS directly from the PatternFly HTML/CSS library while using PatternFly React may result in duplicated stylesheets in the browser as PatternFly React already pulls in styles internally via `@patternfly/react-styles`.
 
 ## Develop with HTML/CSS