fix slash in README
fix slash in README

masteinhauser/devopsdays-web,joelaha/devopsdays-web,benjohnson77/devopsdays-web,benjohnson77/devopsdays-web,joelaha/devopsdays-web,masteinhauser/devopsdays-web,benjohnson77/devopsdays-web,benjohnson77/devopsdays-web,joelaha/devopsdays-web,masteinhauser/devopsdays-web,joelaha/devopsdays-web,masteinhauser/devopsdays-web