update wording

Author: TimidRobot

content/programs/contrib-guide/contents.lr

@@ -31,9 +31,9 @@ officially starts:
 - Introduce yourself to the members of CC's engineering team.
 
 
-## Internship Period
+## Work Program Period
 
-Once the internship starts, here's what we expect of you:
+Once the work program starts, here's what we expect of you:
 
 - For large projects: Work 30-40 hours per week (or agree on a different plan
   with your mentor ahead of time).