apply little comma fix

Author: dimaMachina

src/pages/blog/2024-06-08-announcing-new-graphql-website/index.mdx

@@ -82,7 +82,7 @@ with realtime results and improved privacy.
 
 ### Light and Dark Themes
 
-For the first time, since the creation of graphql.org, we have a dark theme! You
+For the first time since the creation of graphql.org, we have a dark theme! You
 can switch between light and dark themes using the toggle in the top right
 corner.