Update README.md

Author: LucyMacko

README.md

@@ -77,7 +77,7 @@ Each exercise is a small react application containing the following files:
 2. **README.md:** contains exercise instructions.
 3. **test.js:** you don't have to open this file, it contains the testing script for the exercise.
 
-> Note: The exercises have automatic grading but its very rigid and string, my recomendation is to ignore the tests and use them only as a recomendation or you can get frustrated.
+> Note: The exercises have automatic grading but its very rigid and strict. My recommendation is to ignore the tests and use them only as a recommendation, or you can get frustrated.
 
 ## Contributors