update chapter 6

guides/CHAPTER-6.md

@@ -27,7 +27,7 @@ main();
 ```
 
 In this example, the `ComposableLoader` will initialize the configuration management system, 
-search and register4 available user functions into the event system. The default location
+search and register available user functions into the event system. The default location
 of the system files is the "src/resources" folder.
 
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