Update README.md

README.md

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 ### Part 9.0 - Test `ZipCodeWilmington`
 * Create a `TestZipCodeWilmington` class.
-	* Create a `testHostLecture` method which ensures that each of the `Student`'s `totalStudyTime` instance variable is incremented by the specified `numberOfHours` upon invoking the `.hostLecture` method.
+	* Create a `testHostLecture` method which ensures that each of the `Student`'s `totalStudyTime` instance variable is incremented by the specified `numberOfHours` upon invoking the `hostLecture` method.