Typo Update content-reuse.md

There is a small typo in the heading for the "How to Use a Single Reusable Content Components" section. The word "Components" should be singular, as the section is referring to a single component.

notes/content-reuse.md

@@ -10,7 +10,7 @@ The content directory contains markdown files that can be imported across the ne
 
 Create a `.md` file in the `/content` directory.
 
-### How to Use a Single Reusable Content Components
+### How to Use a Single Reusable Content Component
 
 1. Import it at the top of `.mdx` file: