Fix typo in Matchmaking class filename (#312)

Fix Typo in the Matchmaking file

Author: crudeboy

_posts/tutorials/2024-01-13-omeglin/2023-12-30-building-omegle-in-javalin.md

@@ -58,7 +58,7 @@ src
 │   │       └── javalin
 │   │           └── omeglin
 │   │               ├── OmeglinMain.kt/java // main class
-│   │               └── Matchmaker.kt/java  // matchmaking logic
+│   │               └── Matchmakaking.kt/java  // matchmaking logic
 └── resources
     └── public
         ├── index.html                      // html for the frontend