HIVE-29313 - Update documentation about displaying txn id in show pro…

[tarak271]

New output from show processlist with txn id would look like below

+------------+------------+-------------------+---------------------------------------+--------------------------+------------------------+----------------------------------------------------+----------+---------+--------------------------+-------------------+---------------+
| User Name  |  Ip Addr   | Execution Engine  |              Session Id               | Session Active Time (s)  | Session Idle Time (s)  |                      Query ID                      |  State   | Txn ID  |   Opened Timestamp (s)   | Elapsed Time (s)  |  Runtime (s)  |
+------------+------------+-------------------+---------------------------------------+--------------------------+------------------------+----------------------------------------------------+----------+---------+--------------------------+-------------------+---------------+
| anonymous  | 127.0.0.1  | tez               | fb33f25e-bc8f-42f4-9ed2-28ca3ea55806  | 3                        | 1                      | tarak_20251113120712_e9a91156-c8fa-401d-9ab9-b44444c6768d | RUNNING  | 527     | 2025-11-13 12:07:12.571  | 1                 | Not finished  |
| anonymous  | 127.0.0.1  | tez               | 24c029d3-cfa3-43ae-966c-a262b3f0d323  | 3                        | 1                      | tarak_20251113120712_ff6524ff-2e12-4d36-803a-e1425ec18e60 | RUNNING  | 528     | 2025-11-13 12:07:12.579  | 1                 | Not finished  |
+------------+------------+-------------------+---------------------------------------+--------------------------+------------------------+----------------------------------------------------+----------+---------+--------------------------+-------------------+---------------+

[okumin]

👍

[okumin]

Seems consistent also with my local attempt
apache/hive#6141 (comment)