Dear Rishabh, welcome to The Automotive India!
There's nothing wrong with your car. All cars behave like this whenever the clutch engages/disengages. Very crudely speaking, a clutch is used to 'connect and disconnect' the engine from the wheels. When you press the clutch, the friction between the clutch plate and the flywheel changes due to which you hear this faint noise.
Just relax and drive on!