Replace unnecessary LHS type with var

Co-authored-by: Robin Stocker <robinst@canva.com>

Author: stupar73

commonmark-ext-task-list-items/src/main/java/org/commonmark/ext/task/list/items/internal/TaskListItemMarkdownNodeRenderer.java

@@ -18,7 +18,7 @@ public TaskListItemMarkdownNodeRenderer(MarkdownNodeRendererContext context) {
     @Override
     public void render(Node node) {
         if (node instanceof TaskListItemMarker) {
-            TaskListItemMarker taskListItemNode = (TaskListItemMarker) node;
+            var taskListItemNode = (TaskListItemMarker) node;
             var checkboxFill = taskListItemNode.isChecked() ? "x" : " ";
             writer.raw("[" + checkboxFill + "] ");
             renderChildren(node);