Doc typo

Author: JoshRosen

core/src/main/java/org/apache/spark/TaskContext.java

@@ -100,7 +100,7 @@ static void unset() {
 
   /**
    * An ID recording how many times this task has been attempted.  The first task attempt will be
-   * assigned attemptId = 0, and subsequent attempts will have increasing ids.
+   * assigned attemptId = 0, and subsequent attempts will have increasing IDs.
    */
   public abstract long attemptId();