Update corp_members.yml

Author: ccapellan

_data/corp_members.yml

@@ -646,7 +646,7 @@
   URL: https://unboundsecurity.ai/
   job_url:
   description: Unbound is an AI middleware that enables the safe adoption of AI by protecting internal and external AI applications. Its AI security platform includes a comprehensive set of customizable guardrails, model routing, and evaluation functionality.
-- member: 4
+- member: true
   sponsor: -1
   name: Cobalt  
   sortname: Cobalt