Update CONTRIBUTING.md

CONTRIBUTING.md

@@ -29,7 +29,7 @@ Or run tests by category:
 ```bash
 $ ./gradlew testUnit # run only unit tests
 $ ./gradlew testIntegration # run only integration tests
-$ ./gradlew testDataAccess # run only ata access tests
+$ ./gradlew testDataAccess # run only data access tests
 ```
 
 We use [spotless](https://github.com/diffplug/spotless) to format our code. This ensures `.java` files are formatted to comply with [Google Java Style](https://google.github.io/styleguide/javaguide.html). Make sure your code is formatted before pushing any changes, otherwise CI will fail: