unique data dsl update

Author: bjuric

docs/04-dsl.mdx

@@ -7835,11 +7835,11 @@ Since [v4.8.0](https://github.com/gwen-interpreter/gwen-web/releases/tag/v4.8.0)
   ```gherkin
   <name> should be unique in the "<filepath>" file
   ```
-  <p>Checks that the current value of a field is unique in a CSV or JSON input file</p>
+  <p>Checks that the current value of a field (or aggregation of fields) is unique in a CSV or JSON input file</p>
   </summary>
   <p>Where</p>
   <ul>
-    <li><code>&lt;name&gt;</code>the name of the field to check</li>
+    <li><code>&lt;name&gt;</code>the name of the field (or comma separated fields aggregation) to check</li>
     <li><code>&lt;filepath&gt;</code> the path to the CSV or JSON file</li>
   </ul>
 
@@ -7903,11 +7903,11 @@ Since [v4.8.0](https://github.com/gwen-interpreter/gwen-web/releases/tag/v4.8.0)
   ```gherkin
   <name> should be unique in <filepathRef file>
   ```
-  <p>Checks that the current value of a field is unique in a CSV or JSON input file</p>
+  <p>Checks that the current value of a field (or aggregation of fields) is unique in a CSV or JSON input file</p>
   </summary>
   <p>Where</p>
   <ul>
-    <li><code>&lt;name&gt;</code>the name of the field to check</li>
+    <li><code>&lt;name&gt;</code>the name of the field (or comma separated fields aggregation) to check</li>
     <li><code>&lt;filepathRef file&gt;</code> is the name of the binding containing the path of the CSV or JSON file</li>
   </ul>