fix(curriculum): typo in lesson description and test hints (freeCodeCamp#56746)

Author: RGHANILOO

curriculum/challenges/english/25-front-end-development/lab-email-masker/66b205e6eacba4c4e54ea434.md

@@ -24,13 +24,13 @@ Fulfill the user stories below and get all the tests to pass to complete the lab
 
 # --hints--
 
-You should define a funtion named `maskEmail`.
+You should define a function named `maskEmail`.
 
 ```js
 assert.isFunction(maskEmail);
 ```
 
-The `maskEmail` funtion should take a string, `email` as an argument.
+The `maskEmail` function should take a string, `email` as an argument.
 
 ```js
 assert.match(maskEmail.toString(), /\s*maskEmail\(\s*\w+\s*\)/);

curriculum/challenges/english/25-front-end-development/lab-leap-year-calculator/66c06fad3475cd92421b9ac2.md

@@ -15,7 +15,7 @@ Fulfill the user stories below and get all the tests to pass to complete the lab
 
 1. Define a function called `isLeapYear` that takes a number as an argument.
 2. Outside the function, declare a variable `year` that stores the value of the year you want to check.
-3. Inside the funtion, use an `if/ else` statement or a ternary operator to check if the year is a leap year. 
+3. Inside the function, use an `if/ else` statement or a ternary operator to check if the year is a leap year. 
 4. To check if the year is a leap year, fulfill the following conditions: 
 
    - If the year is divisible by `4`, then it is a leap year.
@@ -34,7 +34,7 @@ You should define a function named `isLeapYear`.
 assert(typeof isLeapYear === 'function');
 ```
 
-The `isLeapYear` funtion should take a number as an argument.
+The `isLeapYear` function should take a number as an argument.
 
 ```js
 assert.match(isLeapYear.toString(), /\s*isLeapYear\(\s*\w+\s*\)/);