Minor changes to docs

Author: JohannesJander

README.md

@@ -43,6 +43,7 @@ so show me the goods.
 
 Found a problem and would like to fix it? Have that great idea and would love to see it in the repository?
 
+> [!NOTE]
 > Please open an issue before you start working.
 
 It  saves a lot of time for everyone, and we are super happy to answer questions and help you along the way. 

src/main/java/io/frictionlessdata/tableschema/tabledatasource/JsonArrayTableDataSource.java

@@ -81,7 +81,7 @@ public Iterator<String[]> iterator() {
 						values.add(val.asText(""));
 				}
 			} else if (input instanceof ArrayNode) {
-				Iterator<JsonNode> elements = ((ArrayNode) input).elements();
+				Iterator<JsonNode> elements = input.elements();
 				while (elements.hasNext()) {
 					values.add(elements.next().asText(""));
 				}