Fix typo in ListLineTracker

Author: BoykoAlex

src/main/java/org/springframework/cli/runtime/engine/actions/handlers/json/ListLineTracker.java

@@ -93,8 +93,8 @@ else if (offset > line.offset) {
 				}
 			}
 			else if (offset == line.offset) {
-				// left = right = mid;
-				left = mid;
+				right = mid;
+				left = right;
 			}
 		}