message: docs: Clarify scope of jest.setTimeout
diff: @@ -643,7 +643,7 @@ Returns the number of fake timers still left to run.
  ### `jest.setTimeout(timeout)`
  -Set the default timeout interval for tests and before/after hooks in milliseconds.
  +Set the default timeout interval for tests and before/after hooks in milliseconds. This only affects the test file from which this function is called.
  _Note: The default timeout interval is 5 seconds if this method is not called._
  