Add Benjie to July primary WG (#1324)

Author: benjie

agendas/2023/07-Jul/06-wg-primary.md

@@ -104,6 +104,7 @@ hold additional secondary meetings later in the month.
 | Lee Byron (Host) | @leebyron     | GraphQL Foundation | San Francisco, CA, US |
 | Rob Richard      | @robrichard   | 1stDibs            | Jersey City, NJ, US   |
 | Yaacov Rydzinski | @robrichard   | Individual         | Neve Daniel, IL       |
+| Benjie Gillam    | @benjie       | Graphile           | Chandler's Ford, UK   |
 
 
 ## Agenda