chore(docs): Fix typo in part-7 tutorial (#33556)

Author: ParasRawat29

docs/docs/tutorial/part-7/index.mdx

@@ -533,7 +533,7 @@ Once your changes have been pushed to GitHub, Gatsby Cloud should notice the upd
 ### Key takeaways
 
 * Use the `StaticImage` component if your component always renders the same image (from a relative path or a remote URL).
-* Use the `GatsbyImage` component if the image source is changes for different instances of your component (like if it gets passed in as a prop).
+* Use the `GatsbyImage` component if the image source changes for different instances of your component (like if it gets passed in as a prop).
 
 <Announcement style={{marginBottom: "1.5rem"}}>