typo: changed 'test' to 'tests'

Author: nathan-websculpt

website/src/pages/en/subgraphs/developing/creating/unit-testing-framework.mdx

@@ -97,7 +97,7 @@ This will run all tests in the test folder:
 graph test
 ```
 
-This will run a test named gravity.test.ts and/or all test inside of a folder named gravity:
+This will run a test named gravity.test.ts and/or all tests inside of a folder named gravity:
 
 ```sh
 graph test gravity