Fixed typo

doc/developer/code-contribution.md

@@ -25,7 +25,7 @@ git checkout -b <branch name>
 
 1. Please review the [Mattermost Style Guide](style-guide.md) prior to making changes.
 
-   To keep code clean and well structured, Mattermost users ESLint to check that pull requests adhere to style guidelines for React. Code will need to follow Mattermost's React style guidelines in order to pass the automated build tests when a pull request is submitted.
+   To keep code clean and well structured, Mattermost uses ESLint to check that pull requests adhere to style guidelines for React. Code will need to follow Mattermost's React style guidelines in order to pass the automated build tests when a pull request is submitted.
    
 2. Please make sure to thoroughly test your change before submitting a pull request.