fix(ios): element.takeScreenshot() invalid filename

[noomorph]

Description

Fixes errors like this:

ENAMETOOLONG: name too long, lstat '/Users/.../Library/Developer/CoreSimulator/Devices/B833321F-83AE-4B57-A042-835AC4460D0B/data/Containers/Data/Application/817BD36F-5DE8-4729-8FA8-740790D86D79/tmp/elementsScreenshot/ImageScreenshot_<RCTParagraphComponentView: 0x105b335e0; frame = (0 0; 60.3333 17); opaque = NO; tag = 244; layer = <CALayer: 0x6000002275c0>; attributedText = Say Hello{

          EventEmitter = {length = 8, bytes = 0xd858510300600000};
          NSBackgroundColor = "UIExtendedSRGBColorSpace 0 0 0 0";
          NSColor = "UIExtendedSRGBColorSpace 0 0 1 1";
          NSFont = "<UICTFont: 0x105c11f90> font-family: \".SFUI-Regular\"; font-weight: normal; font-style: normal; font-size: 14.00pt";
      }>.png'

This is... kinda a filename ↑. So, instead of %@, I suggest using %p (pointer), e.g.: ImageScreenshot_0x105b335e0.png.