Follow the supply agent's rename

Its Keycloak client and audience scope changed name; the peer entry and the
environment variables that point at it move with them.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

k8s/configmap.yaml

@@ -26,4 +26,4 @@ data:
   CATALOGUE_PUBLIC_URL: http://catalog-agent.agents.svc.cluster.local:8080/
   # The peer's Service name, overriding the default in config.py — set here so
   # the rename took effect without rebuilding an image.
-  CATALOGUE_APPROVISIONNEMENT_URL: http://supply-agent.agents.svc.cluster.local:8080/
+  CATALOGUE_SUPPLY_URL: http://supply-agent.agents.svc.cluster.local:8080/