fix(curriculum): update example codes for set and tuple (#66282)

curriculum/challenges/english/blocks/lecture-understanding-variables-and-data-types/67fe859a00971c34a23abd43.md

@@ -69,11 +69,11 @@ my_boolean_var = True
 print('Boolean:', my_boolean_var) # Boolean: True
 ```
 
-- Set: An unordered collection of unique elements, like `{4, 2, 0}`.
+- Set: An unordered collection of unique elements, like `{0.5, 4, 'apple'}`.
  
 ```python
-my_set_var = {7, 5, 8}
-print('Set:', my_set_var) # Set: {7, 5, 8}
+my_set_var = {7, 'hello', 8.5}
+print('Set:', my_set_var) # Set: {7, 'hello', 8.5}
 ```
 
 - Dictionary: A collection of key-value pairs enclosed in curly braces, like `{'name': 'John Doe', 'age': 28}`. 
@@ -83,11 +83,11 @@ my_dictionary_var = {'name': 'Alice', 'age': 25}
 print('Dictionary:', my_dictionary_var) # Dictionary: {'name': 'Alice', 'age': 25}
 ```
 
-- Tuple: An immutable ordered collection, enclosed in brackets, like `(7, 8, 4)`.
+- Tuple: An immutable ordered collection, enclosed in parentheses, like `('apple', 4.5, 7)`.
 
 ```python
-my_tuple_var = (7, 5, 8)
-print('Tuple:', my_tuple_var) # Tuple: (7, 5, 8)
+my_tuple_var = (7, 'hello', 8.5)
+print('Tuple:', my_tuple_var) # Tuple: (7, 'hello', 8.5)
 ```
 
 - Range: A sequence of numbers, often used in loops, for example, `range(5)`.
@@ -136,13 +136,13 @@ print(type(my_string_var))  # <class 'str'>
 my_boolean_var = True
 print(type(my_boolean_var))  # <class 'bool'>
 
-my_set_var = {7, 5, 8}
+my_set_var = {7, 'hello', 8.5}
 print(type(my_set_var))  # <class 'set'>
 
 my_dictionary_var = {'name': 'Alice', 'age': 25}
 print(type(my_dictionary_var))  # <class 'dict'>
 
-my_tuple_var = (7, 5, 8)
+my_tuple_var = (7, 'hello', 8.5)
 print(type(my_tuple_var))  # <class 'tuple'>
 
 my_range_var = range(5)