Update ITD frequency (#1540)

It dropped down to 5/year a while ago

Author: illicitonion

org-cyf-theme/data/courses/itd.toml

@@ -7,5 +7,5 @@ emoji="🫱🏽‍🫲🏿"
 description="Meet the world of tech: write a CV with AI; evaluate data in spreadsheets; build and deploy your first websites"
 days=30
 commitment="part time"
-frequency=6
+frequency=5
 locations=["Birmingham", "Capetown", "Glasgow", "London", "Manchester", "Online", "Sheffield"]