added UNKNWON enum

Author: spinits4

specification/resources/apps/apps_list_deployments.yml

@@ -14,6 +14,7 @@ parameters:
   - name: deployment_types
     description: |-
       Optional. Filter deployments by deployment_type
+        - UNKOWN: default option, its' behavior is to return all deployments(like no filter was used)
         - MANUAL: manual deployment
         - DEPLOY_ON_PUSH: deployment triggered by a push to the app's repository
         - MAINTENANCE: deployment for maintenance purposes
@@ -28,6 +29,7 @@ parameters:
       items:
         type: string
         enum:
+          - UNKNOWN
           - MANUAL
           - DEPLOY_ON_PUSH
           - MAINTENANCE