Officially announce new C2 for training and conference requests

[ethanheppner]

• [x] Pull request is already merged.
• [ ] Update section 3 of comms with Acq office hours
• [ ] Pia office hours TBD
• [ ] Determine PIF process for training approvals/purchases
• [ ] Determine OPP process for training approvals/purchases
• [ ] Comms are here. Release them when the C2 link officially updates to requests.18f.gov.