fix: Undefined array key error in spark db:table

[kenjis]

Description

Before:

$ php spark db:table

CodeIgniter v4.4.3 Command Line Tool - Server Time: 2023-11-08 04:13:04 UTC+00:00

Here is the list of your database tables:
  [0]  migrations

Which table do you want to see? 0: a


[ErrorException]

Undefined array key "a"

at SYSTEMPATH/Commands/Database/ShowTableInfo.php:136

Backtrace:
  1    SYSTEMPATH/Commands/Database/ShowTableInfo.php:136
       CodeIgniter\Debug\Exceptions()->errorHandler(2, 'Undefined array key "a"', '/.../CodeIgniter4/system/Commands/Database/ShowTableInfo.php', 136)

  2    SYSTEMPATH/CLI/Commands.php:65
       CodeIgniter\Commands\Database\ShowTableInfo()->run([])

  3    SYSTEMPATH/CLI/Console.php:46
       CodeIgniter\CLI\Commands()->run('db:table', [])

  4    ROOTPATH/spark:102
       CodeIgniter\CLI\Console()->run()

After:

$ php spark db:table

CodeIgniter v4.4.3 Command Line Tool - Server Time: 2023-11-08 04:12:37 UTC+00:00

Here is the list of your database tables:
  [0]  migrations

Which table do you want to see? 0: a

Here is the list of your database tables:
  [0]  migrations

Which table do you want to see? 0: 1

Here is the list of your database tables:
  [0]  migrations

Which table do you want to see? 0: 

Checklist:

• Securely signed commits
• Component(s) with PHPDoc blocks, only if necessary or adds value
• Unit testing, with >80% coverage
• User guide updated
• Conforms to style guide