Update CFP dates for Baltimore
Update CFP dates for Baltimore

* The CFP is open
* This will also allow the event to be listed on /speaking

Signed-off-by: Nathen Harvey <f3cabdeba0e84594589839e3e1ff17618f7c11d9@chef.io>

gomex/devopsdays-web,gomex/devopsdays-web,gomex/devopsdays-web,gomex/devopsdays-web