Key OK is missing from en_us

[tomasz-brak]

Describe the bug

When using the color-syntax-plugin the error pops up in the console and the markdown doesnt render

To Reproduce

1. Create a viewer
2. Add the color-syntax-plugin
3. Observe the error

Expected behavior

Missing translation is displayed as a not localized text, or gets skiped. HTML renders

Screenshots

Desktop (please complete the following information):

Windows 11
"name": "@toast-ui/editor",
"version": "3.2.2",

Additional context

Something with I18n

[scarqin]

#2187