Update .gitlab-ci.yml file

.gitlab-ci.yml

@@ -4,7 +4,7 @@ variables:
       description: "Enter which tests to be execute. Other valid options are - 'attestation', 'connection', 'proof','negative'."
     BASE_URL:
       value: "https://gaiax.vereign.com/ocm"
-      description: "Enter the environment on which the services are deployed."
+      description: "Enter the environment on which the services are deployed.Existing Vereign Env's are : https://gaiax.vereign.com/ocm , https://ssi-dev.vereign.com/ocm , https://ssi.vereign.com/ocm "
 
 stages:
   - test