Merge pull request #693 from lsytj0413/fix-parallel-desp

fix(*): parallel numCompleted is required if completionType is `atLeast`

Author: cdavernas

specification.md

@@ -2504,7 +2504,7 @@ Note that `transition` and `end` properties are mutually exclusive, meaning that
 | type | State type | string | yes |
 | [branches](#Parallel-State-Branch) | List of branches for this parallel state| array | yes |
 | completionType | Option types on how to complete branch execution. Default is "allOf" | enum | no |
-| numCompleted | Used when branchCompletionType is set to `atLeast` to specify the least number of branches that must complete in order for the state to transition/end. | string or number | no |
+| numCompleted | Used when branchCompletionType is set to `atLeast` to specify the least number of branches that must complete in order for the state to transition/end. | string or number | yes (if completionType is `atLeast`) |
 | [timeouts](#Workflow-Timeouts) | State specific timeout settings | object | no |
 | [stateDataFilter](#State-data-filters) | State data filter | object | no |
 | [onErrors](#Error-Definition) | States error handling and retries definitions | array | no |