fix typos (#164)

exercises/dict/dict1.cairo

@@ -3,8 +3,8 @@
 // In this exercise, you will map a `felt252` key to a value of type `u32`.
 
 // Your task is to create a `Felt252Dict`  containing three elements of type `u32`.
-// The first element shoud map the key 'A' to the value 1, the second key 'B' to the value 2 
-// and the third shoud map 'bob' to the value 3.
+// The first element should map the key 'A' to the value 1, the second key 'B' to the value 2
+// and the third should map 'bob' to the value 3.
 // Make me compile and pass the test!
 // Execute `starklings hint dict1` or use the `hint` watch subcommand for a hint.
 

exercises/dict/dict2.cairo

@@ -1,6 +1,6 @@
 // dict2.cairo
 // Dictionaries can be used to simulate dynamic array : the value they store can be accessed and modified.
-// Your task is to create a function that mutliplies the elements stored at the indexes 0 to n of a dictionary by 10
+// Your task is to create a function that multiplies the elements stored at the indexes 0 to n of a dictionary by 10
 // Make me compile and pass the test!
 // Execute `starklings hint dict2` or use the `hint` watch subcommand for a hint.
 
@@ -9,7 +9,7 @@
 
 
 fn multiply_element_by_10(ref dict: Felt252Dict<u32>, n: usize) {
-    //TODO : make a function that mutliplies the elements stored at the indexes 0 to n of a dictionary by 10
+    //TODO : make a function that multiplies the elements stored at the indexes 0 to n of a dictionary by 10
 
 
 }