Revert inappropriate capitalization of "Transition" (#6746)

Author: smikitky

src/content/reference/react/Suspense.md

@@ -1741,7 +1741,7 @@ function Router() {
   // ...
 ```
 
-This tells React that the state Transition is not urgent, and it's better to keep showing the previous page instead of hiding any already revealed content. Now clicking the button "waits" for the `Biography` to load:
+This tells React that the state transition is not urgent, and it's better to keep showing the previous page instead of hiding any already revealed content. Now clicking the button "waits" for the `Biography` to load:
 
 <Sandpack>