Update core-services.md

node.js/core-services.md

@@ -457,7 +457,7 @@ Ensure to call `super.init()` to allow subclasses to register their handlers. Do
 function srv.prepend(()=>{...})
 ```
 
-Sometimes, you need to register handlers to run before handlers registered by others before. Use srv.prepend() to do so ´, for example like this:
+Sometimes, you need to register handlers to run before handlers registered by others before. Use `srv.prepend()` to do so, for example like this:
 
 ```js
 cds.on('served',()=>{