workflowsSpec MUST be used for interpretation (#133)

versions/1.0.0.md

@@ -133,7 +133,7 @@ This is the root object of the [Workflows Description](#workflows-description).
 
 Field Name | Type | Description
 ---|:---:|---
-<a name="workflowsVersion"></a>workflowsSpec | `string` | **REQUIRED**. This string MUST be the [version number](#versions) of the Workflows Specification that the Workflows Description uses. The `workflowsSpec` field SHOULD be used by tooling to interpret the Workflows Description.
+<a name="workflowsVersion"></a>workflowsSpec | `string` | **REQUIRED**. This string MUST be the [version number](#versions) of the Workflows Specification that the Workflows Description uses. The `workflowsSpec` field MUST be used by tooling to interpret the Workflows Description.
 <a name="workflowsInfo"></a>info | [Info Object](#info-object) | **REQUIRED**. Provides metadata about the Workflows. The metadata MAY be used by tooling as required.
 <a name="workflowsSources"></a>sourceDescriptions | [[Source Description Object](#source-description-object)] | **REQUIRED**. A list of source descriptions (such as an OpenAPI description) this workflow SHALL apply to. The list MUST have at least one entry.
 <a name="workflows"></a>workflows | [[Workflow Object](#workflow-object)] | **REQUIRED**. A list of workflows. The list MUST have at least one entry.