Update kotlin-tour-intermediate-extension-functions.md

parameters for function definition, arguments for function calling

Author: Geek-Joe

docs/topics/tour/kotlin-tour-intermediate-extension-functions.md

@@ -38,7 +38,7 @@ In this example, the `main()` function calls the [`.first()`](https://kotlinlang
 The `.first()` function is called **on** the `readOnlyShapes` variable, so the `readOnlyShapes` variable is the receiver.
 
 To create an extension function, write the name of the class that you want to extend followed by a `.` and the name of
-your function. Continue with the rest of the function declaration, including its arguments and return type.
+your function. Continue with the rest of the function declaration, including its parameters and return type.
 
 For example:
 
@@ -186,4 +186,4 @@ fun main() {
 
 ## Next step
 
-[Intermediate: Scope functions](kotlin-tour-intermediate-scope-functions.md)
+[Intermediate: Scope functions](kotlin-tour-intermediate-scope-functions.md)