Merge pull request #59 from Meg528/patch-44

Update 80-array-sizes.mdx

Author: dfreniche

docs/40-using-arrays/80-array-sizes.mdx

@@ -1,7 +1,7 @@
 import Tabs from '@theme/Tabs';
 import TabItem from '@theme/TabItem';
 
-# 🦸 Size of an array
+# 🦸 Size of an Array
 
 What if we want to know how many aliases an author has? To do that, we can use `$size`, adding the array field that we're interested in:
 
@@ -87,7 +87,7 @@ db.authors.aggregate([
 </details>
 
 
-👐 Find books with exactly three genres (We can $match using `{ {"bookCount": -1}}`.)
+👐 Find books with exactly three genres (we can $match using `{ {"bookCount": -1}}`).
 
 
 <details>
@@ -134,4 +134,4 @@ db.books.aggregate([
 </Tabs>
 
 </div>
-</details>
+</details>