Button - hardware debouncing with 1uF capacitor (Arduino Uno R3)

The difference between 100nF and 330nF isn't going to be a deal-breaker. The gist of the problem with a 1uF cap is that it's overkill. It stores more energy, which you short to ground when you press the switch, subjecting the contacts to avoidable stress. Instead of, or in addition to a smaller cap, you might want to put a 100R resistor between the cap and the switch. (Cap + to input pin, cap - to ground, cap + also through 100R resistor to switch +, switch - to ground.) This helps limit current surges when the button is pressed.

BTW, the cap in your image there is a polarized electrolytic, and you have it backwards. The stripe is usually the negative side.

One more tip: Keep an eye on your image resolution. If the width is > 1000 pixels, it means most users will need to scroll around to see it all, which is really distracting when tracing parts of a diagram. Try to keep it under 1000 unless you need the resolution to convey detail.