Merge pull request #50 from Meg528/patch-33

Update 2-match.mdx

Author: dfreniche

docs/30-simple-queries/2-match.mdx

@@ -173,7 +173,7 @@ db.books.aggregate([
 </div>
 </details>
 
-👐 How many are there? We haven't yet seen the `$count` stage, but try to adding a second stage to your pipeline with `{ $count: "books_count" }`
+👐 How many are there? We haven't yet seen the `$count` stage, but try to add a second stage to your pipeline with `{ $count: "books_count" }`.
 
 <details>
 <summary>Answer</summary>