docs: add sub-tbname rule note for tcollector (#17167)

docs/en/20-third-party/08-tcollector.md

@@ -33,11 +33,12 @@ Wait for a few seconds and then use the TDengine CLI to query whether the corres
 
 ```
 taos> show databases;
-              name              |      created_time       |   ntables   |   vgroups   | replica | quorum |  days  |           keep           |  cache(MB)  |   blocks    |   minrows   |   maxrows   | wallevel |    fsync    | comp | cachelast | precision | update |   status   |
-====================================================================================================================================================================================================================================================================================
- tcollector                     | 2022-04-20 12:44:49.604 |          88 |           1 |       1 |      1 |     10 | 3650                     |          16 |           6 |         100 |        4096 |        1 |        3000 |    2 |         0 | ns        |      2 | ready      |
- log                            | 2022-04-20 07:19:50.260 |          11 |           1 |       1 |      1 |     10 | 3650                     |          16 |           6 |         100 |        4096 |        1 |        3000 |    2 |         0 | ms        |      0 | ready      |
-Query OK, 2 row(s) in set (0.002679s)
+              name              |
+=================================
+ information_schema             |
+ performance_schema             |
+ tcollector                     |
+Query OK, 3 rows in database (0.001647s)
 
 taos> use tcollector;
 Database changed.
@@ -65,3 +66,8 @@ taos> show stables;
  proc.vmstat.pgmajfault         | 2022-04-20 12:44:54.251 |       2 |      1 |           1 |
 ...
 ```
+
+:::note
+
+- TDengine will automatically create unique IDs for sub-table names by the rule.
+:::

docs/zh/20-third-party/08-tcollector.md

@@ -34,11 +34,13 @@ sudo systemctl restart taosadapter
 
 ```
 taos> show databases;
-              name              |      created_time       |   ntables   |   vgroups   | replica | quorum |  days  |           keep           |  cache(MB)  |   blocks    |   minrows   |   maxrows   | wallevel |    fsync    | comp | cachelast | precision | update |   status   |
-====================================================================================================================================================================================================================================================================================
- tcollector                     | 2022-04-20 12:44:49.604 |          88 |           1 |       1 |      1 |     10 | 3650                     |          16 |           6 |         100 |        4096 |        1 |        3000 |    2 |         0 | ns        |      2 | ready      |
- log                            | 2022-04-20 07:19:50.260 |          11 |           1 |       1 |      1 |     10 | 3650                     |          16 |           6 |         100 |        4096 |        1 |        3000 |    2 |         0 | ms        |      0 | ready      |
-Query OK, 2 row(s) in set (0.002679s)
+              name              |
+=================================
+ information_schema             |
+ performance_schema             |
+ tcollector                     |
+Query OK, 3 rows in database (0.001647s)
+
 
 taos> use tcollector;
 Database changed.
@@ -66,3 +68,8 @@ taos> show stables;
  proc.vmstat.pgmajfault         | 2022-04-20 12:44:54.251 |       2 |      1 |           1 |
 ...
 ```
+
+:::note
+
+- TDengine 默认生成的子表名是根据规则生成的唯一 ID 值。
+:::