[doc] Doc of create_tag by latest snapshot (#2993)

docs/content/engines/flink.md

@@ -392,7 +392,10 @@ table options syntax: we use string to represent table options. The format is 'k
    <tr>
       <td>create_tag</td>
       <td>
-         CALL [catalog.]sys.create_tag('identifier', 'tagName', snapshotId)
+         -- based on the specified snapshot <br/>
+         CALL [catalog.]sys.create_tag('identifier', 'tagName', snapshotId) <br/>
+         -- based on the latest snapshot <br/>
+         CALL [catalog.]sys.create_tag('identifier', 'tagName')
       </td>
       <td>
          To create a tag based on given snapshot. Arguments:

docs/content/engines/spark.md

@@ -584,7 +584,12 @@ s
             <li>tag: name of the new tag. Cannot be empty.</li>
             <li>snapshot(Long):  id of the snapshot which the new tag is based on.</li>
       </td>
-      <td>CALL sys.create_tag(table => 'default.T', tag => 'my_tag', snapshot => 10)</td>
+      <td>
+         -- based on snapshot 10 <br/>
+         CALL sys.create_tag(table => 'default.T', tag => 'my_tag', snapshot => 10) <br/>
+         -- based on the latest snapshot <br/>
+         CALL sys.create_tag(table => 'default.T', tag => 'my_tag')
+      </td>
     </tr>
     <tr>
       <td>delete_tag</td>

docs/content/maintenance/manage-tags.md

@@ -39,7 +39,7 @@ Paimon supports automatic creation of tags in writing job.
 
 **Step 1: Choose Creation Mode**
 
-You can set `'tag.automatic-creation'` to `process-time` or `watermark`:
+You can set creation mode by table option `'tag.automatic-creation'`. Supported values are:
 - `process-time`: Create TAG based on the time of the machine.
 - `watermark`: Create TAG based on the watermark of the Sink input.
 - `batch`: In a batch processing scenario, a tag is generated after the current task is completed.