Fix parameter/argument terminology in tic-tac-toe tutorial

[Nabeel-akk]

Fix terminology in the tic-tac-toe tutorial where 'argument' was used instead of 'parameter' when referring to function parameters.

Changes:

• "Add an argument $i to the handleClick function" ? "Add a parameter $i to the handleClick function"
• "handleClick uses the argument (0)" ? "handleClick uses the parameter (0)"

Closes #8375