Update AGENTS.MD

Co-authored-by: Georg von Kries <[email protected]>

Author: sebastienros

AGENTS.MD

@@ -434,7 +434,7 @@ public class YourField : ContentField
 - Use `sealed` for classes that should not be inherited
 - Use file-scoped namespaces
 - Prefer collection expressions (`[]`) over `new List<T>()`
-- Avoir use of primary constructors
+- Avoid use of primary constructors
 
 ### Naming Conventions