label war correct in index file

dmn-verifier-app/src/main/webapp/index.xhtml

@@ -20,7 +20,7 @@
             <h:form enctype="multipart/form-data" id="upload">
                 <p:fileUpload value="#{dmnUploadBean.file}"
                               mode="advanced"
-                              expressionName="Choose DMN"
+                              label="Choose DMN"
                               description="Select File (only DMN)"
                               allowTypes="/(\.|\/)(dmn)$/"
                               auto="true"