Replace explicit 'python' reference with sys.executable - so it runs in the currently executing python
Replace explicit 'python' reference with sys.executable - so it runs in the currently executing python

Signed-off-by: Pamela McA'Nulty <67d9674c8455f6c240f73ebadbe2795bb187109a@webreply.com>

daodaoliang/pyscreenshot,ponty/pyscreenshot,ponty/pyscreenshot,ponty/pyscreenshot