Merge pull request #54 from michaelmior/patch-1

Fix grammar in regex section

content/02-Primitive-Types/02-Regular-Expressions-in-Strings/instructions.mdx

@@ -48,6 +48,6 @@ Now, try to modify the `postalCode`, `phoneNumber` and `countryCode` fields in t
 **Constraints:**
 - The `postalCode` should be a string with a length of **exactly 6** characters and should **contain only digits.**
 - The `phoneNumber` should be a string with a **minimum length of 10** characters and should **contain only digits**.
--  The `countryCode` should be a string with a **length of exactly 2** characters and should **contain only uppercase alphabets**. 
+-  The `countryCode` should be a string with a **length of exactly 2** characters and should **contain only uppercase letters**. 
 
-> **Hint:** to only allow uppercase alphabets, you can use the regular expression `[A-Z]` in your regex pattern.
+> **Hint:** to only allow uppercase letters, you can use the regular expression `[A-Z]` in your regex pattern.