[DC-2022] Fix Peter Burkholder's affiliation

I shouldn't look like I'm here on behalf of my specific project.

data/events/2022-washington-dc.yml

@@ -91,7 +91,7 @@ team_members: # Name is the only required field for team members.
     linkedin: "https://www.linkedin.com/in/bryanttn/"
 
   - name: "Peter Burkholder"
-    employer: "cloud.gov"
+    employer: "US Government"
     twitter: "@pburkholder"
     bio: "Geophysicist turned DevOp"
     image: "peter-burkholder.jpg"