Changed Office Hours to new link (#129)

Author: cdahlheimer

development-guidelines/workflow.md

@@ -34,7 +34,7 @@ Finally, be mindful of issues that automated tools cannot easily find:
 
 ## Ask for help
 
-[Ethereum office hours](https://calendly.com/dan-trailofbits/office-hours) run every Tuesday afternoon. These 1-hour, 1-on-1 sessions are an opportunity to ask us any questions you have about security, troubleshoot using our tools, and get feedback from experts about your current approach. We will help you work through this guide.
+[Office Hours](https://calendly.com/trail-of-bits-sales/trail-of-bits-office-hours) run every Tuesday afternoon. These 1-hour, 1-on-1 sessions are an opportunity to ask us any questions you have about security, troubleshoot using our tools, and get feedback from experts about your current approach. We will help you work through this guide.
 
 Join our Slack: [Empire Hacking](https://join.slack.com/t/empirehacking/shared_invite/zt-h97bbrj8-1jwuiU33nnzg67JcvIciUw). We're always available in the #crytic and #ethereum channels if you have any questions.