Corrected wording from 'parameter' to 'argument'

[R-pradeep2005]

Description

Updated the documentation to use the correct Java terminology.

Changes Made

• Replaced the term "parameter" with "argument" in the exercise instructions.
• This aligns the documentation with standard Java terminology, where values passed to a method call are called arguments, while parameters are the variables defined in the method signature.

Reason

The previous wording could be confusing for learners because it referred to the value passed to System.out.println(...) as a parameter. Using the term argument makes the explanation more accurate and educational.