fix comment

Author: JingsongLi

docs/content/pypaimon/cli.md

@@ -261,7 +261,7 @@ paimon table alter DATABASE.TABLE [--ignore-if-not-exists] SUBCOMMAND [OPTIONS]
 
 **Global Options:**
 
-- `--ignore-if-not-exists`: Do not raise error if table does not exist
+- `--ignore-if-not-exists, -i`: Do not raise error if table does not exist
 
 #### Set Option
 

paimon-python/pypaimon/cli/cli_table.py

@@ -495,7 +495,7 @@ def add_table_subcommands(table_parser):
         help='Table identifier in format: database.table'
     )
     alter_parser.add_argument(
-        '--ignore-if-not-exists',
+        '--ignore-if-not-exists', '-i',
         action='store_true',
         help='Do not raise error if table does not exist'
     )