docs: fix typo in configuration runner (#9668)

Just fix a typo in CHANGELOG.md

docs/Configuration.md

@@ -756,7 +756,7 @@ async runTests(
 ): Promise<void>
 ```
 
-If you need to restrict your test-runner to only run in serial rather then being executed in parallel your class should have the property `isSerial` to be set as `true`.
+If you need to restrict your test-runner to only run in serial rather than being executed in parallel your class should have the property `isSerial` to be set as `true`.
 
 ### `setupFiles` [array]