docs: fix indent_root_array type to bool instead of int (#266)

Signed-off-by: Koichi Shiraishi <[email protected]>

Author: zchee

docs/config-file.md

@@ -87,7 +87,7 @@ The basic formatter is a barebones formatter that simply takes the data provided
 | `eof_newline`               | bool           | false   | Always add a newline at end of file. Useful in the scenario where `retain_line_breaks` is disabled but the trailing newline is still needed. |
 | `strip_directives`          | bool           | false   | [YAML Directives](https://yaml.org/spec/1.2.2/#3234-directives) are not supported by this formatter. This feature will attempt to strip the directives before formatting and put them back. [Use this feature at your own risk.](#strip_directives) |
 | `array_indent`              | int            | = indent | Set a different indentation level for block sequences specifically. |
-| `indent_root_array`         | int            | false   | Tells the formatter to indent an array that is at the lowest indentation level of the document. |
+| `indent_root_array`         | bool           | false   | Tells the formatter to indent an array that is at the lowest indentation level of the document. |
 | `disable_alias_key_correction` | bool        | false   | Disables functionality to fix alias nodes being used as keys. See #247 for details. |
 | `force_array_style`         | `flow`, `block`, or empty | empty   | If set, forces arrays to be output in a particular style, either `flow` (`[]`) or `block` (`- x`). If unset, the style from the original document is used. |