Update how-to-create-a-custom-parameter-editor.md (#1797)

Author: petar-i-todorov

embedding-reports/display-reports-in-applications/web-application/react-report-viewer/customizing/how-to-create-a-custom-parameter-editor.md

@@ -87,10 +87,12 @@ let viewer;
 					report: 'MyReport.trdp',
 					parameters: {}
 				}}
-				parameterEditors={{
-					match: match,
-					createEditor: createEditor
-				}} />
+				parameterEditors={[
+					{
+						match: match,
+						createEditor: createEditor
+					}
+				]} />
 		
 			</div>) : null;
 		}