It would certainly go to the same "5V" pin, the important thing being that this pin is where both terminate - the 5 V from the power supply (which is the buck converter), bundled with the ground to the Arduino from that converter, and the connection back to "VCC" on the relay module, bundled with the control wires to the "IN" pins on that module.
So the wiring to the relay module is not shared with the wire connecting the power supply.