Update 5-JOIN.mdx

Author: Meg528

docs/50-aggregation/5-JOIN.mdx

@@ -47,7 +47,7 @@ db.authors.aggregate([
 ]);
 ```
 
-### **Equivalent SQL Query**
+### **Equivalent SQL query**
 
 ```sql
 SELECT books.*, authors.*
@@ -61,11 +61,11 @@ The result in MongoDB will have an array (`authorDetails`) instead of flat colum
 
 ---
 
-## 🔹 Handling Unwinding ($unwind)
+## 🔹 Handling unwinding ($unwind)
 
 Since `$lookup` produces an **array**, we can flatten it using `$unwind`.
 
-### Example 2: Get Only Book Titles and Single Author Name
+### Example 2: Get only book titles and single author name
 
 ```js
 db.authors.aggregate([
@@ -83,7 +83,7 @@ db.authors.aggregate([
 ```
 
 :::info
-The $lookup operation creates an array within each book document. Using $unwind then flattens this array, resulting in a separate document for every single book - author pair.
+The $lookup operation creates an array within each book document. Using $unwind then flattens this array, resulting in a separate document for every single book-author pair.
 :::
 
 ---