fix CoursePlus link for email

Author: carriewright11

resources/email_to_class.txt

@@ -10,7 +10,7 @@ Please take note of the following action items:
 - <PASTE> : The recurring Zoom link for our class.
 - https://jhudatascience.org/intro_to_r/ : Class website. We may be posting additional content the night before each class and this is the most up-to-date source of information.
 - https://jhudatascience.org/intro_to_r/syllabus : The class syllabus.
-- https://courseplus.jhu.edu/core/index.cfm/go/course.home/coid/22418/ : The CoursePlus website has drop boxes for submitting homework and projects.
+- https://courseplus.jhu.edu/core/index.cfm/go/course.home/coid/23764/: The CoursePlus website has drop boxes for submitting homework and projects.
 - https://introductiont-d6b1897.slack.com/: Slack Workspace.
 
 *Join the class Slack channel:*