PDX: Add more sponsors
PDX: Add more sponsors

Added CA (gold), Thoughtworks (gold), and ADO (community) sponsors.


Former-commit-id: c2c050565ad32474b2883d822999907f3b98c155
joelaha/devopsdays-web,joelaha/devopsdays-web,benjohnson77/devopsdays-web,benjohnson77/devopsdays-web,masteinhauser/devopsdays-web,joelaha/devopsdays-web,masteinhauser/devopsdays-web,benjohnson77/devopsdays-web,joelaha/devopsdays-web,masteinhauser/devopsdays-web,masteinhauser/devopsdays-web,benjohnson77/devopsdays-web