Update delattr.md

Fixed heading structure for added examples for delattr()

Author: lukaszwojcik89

docs/builtin/delattr.md

@@ -19,27 +19,27 @@ Python delattr() built-in function
 ## Examples
 
 ```python
-# Example 1
 class Person:
     def __init__(self, name, age):
         self.name = name
         self.age = age
 
-person = Person("John", 30)
-delattr(person, 'age')
-print(person.__dict__)  # Output: {'name': 'John'}
+>>> person = Person("John", 30)
+>>> delattr(person, 'age')
+>>> person.__dict__
+# {'name': 'John'}
 
-# Example 2
 class Car:
     def __init__(self, make, model):
         self.make = make
         self.model = model
 
-car = Car("Toyota", "Corolla")
-try:
-    delattr(car, 'year')
-except AttributeError as e:
-    print(f"Error: {e}")  # Output: Error: 'Car' object has no attribute 'year'
+>>> car = Car("Toyota", "Corolla")
+>>> try:
+...     delattr(car, 'year')
+... except AttributeError as e:
+...     print(f"Error: {e}")
+# Error: 'Car' object has no attribute 'year'
 ```
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