Update openapi.yaml

openapi.yaml

@@ -1665,7 +1665,7 @@ paths:
                     nullable: true
                     description: >-
                       Version number of the openEO process specification this back-end
-                      implements.
+                      targets.
                       If not provided or `null` the version is either unknown or multiple versions are implemented.
                       Clients must be able to handle multiple process versions at the same time.