add 404 comp not found response to upsert rule

Author: ben-kalmus

specs/composition-full/paths/rules/rule.yml

@@ -60,6 +60,8 @@ put:
       $ref: '../../../common/responses/FeatureNotEnabled.yml'
     '403':
       $ref: '../../../common/responses/MethodNotAllowed.yml'
+    '404':
+      $ref: '../../../common/responses/CompositionNotFound.yml'
     '422':
       $ref: '../../../common/responses/UnprocessableEntity.yml'