Fix typo

Signed-off-by: Liyun Xiu <xiliyun@amazon.com>

libs/core/src/main/java/org/opensearch/core/xcontent/XContentBuilder.java

@@ -159,7 +159,7 @@ public static XContentBuilder builder(XContent xContent, Set<String> includes, S
      * Returns a string representation of the builder (only applicable for text based xcontent).
      * Note: explicitly or implicitly (from debugger) calling toString() could cause XContentBuilder
      * to close which is a side effect done by @see BytesReference#bytes().
-     * Trying to write more contents after toString() will cause NPE. Use it with cautious.
+     * Trying to write more contents after toString() will cause NPE. Use it with caution.
      */
     @Override
     public String toString() {