Update part2c.md

In this sentence:

"The registration of the callback happens by giving the eventHandler variable, referring to the event-handler function, AS A PARAMETER to the then method of the promise."

the capitalized part "AS A PARAMETER" I think should be "as an argument" as it refers to a variable being passed into the function.

Author: phonz-dev

src/content/2/en/part2c.md

@@ -491,7 +491,7 @@ useEffect(() => {
 }, [])
 ```
 
-A reference to an event handler function is assigned to the variable <em>eventHandler</em>. The promise returned by the <em>get</em> method of Axios is stored in the variable <em>promise</em>. The registration of the callback happens by giving the <em>eventHandler</em> variable, referring to the event-handler function, as a parameter to the <em>then</em> method of the promise. It isn't usually necessary to assign functions and promises to variables, and a more compact way of representing things, as seen below, is sufficient.
+A reference to an event handler function is assigned to the variable <em>eventHandler</em>. The promise returned by the <em>get</em> method of Axios is stored in the variable <em>promise</em>. The registration of the callback happens by giving the <em>eventHandler</em> variable, referring to the event-handler function, as an argument to the <em>then</em> method of the promise. It isn't usually necessary to assign functions and promises to variables, and a more compact way of representing things, as seen below, is sufficient.
 
 ```js
 useEffect(() => {