Spring-2021.md

@@ -67,7 +67,7 @@
   - Chapter 26 code and notes ✅
   - Chapter 27 code and notes ✅
   - Chapter 28 code and notes [stretch goal] ✅
-- Challenges (all in merge request !11):
+- Challenges (all in merge request !13):
   - Handling missing fields ✅ (issue #44)
   - Dynamic field access ✅ (issue #45)
   - Deleting fields ✅ (issue #46)