Fixing chain translation typo

[davidgrayston]

I noticed chain placeholder messages were not displaying correctly due to typo in ChainCommand.php, e.g:
commands.chain.message.enter-value-for-placeholder:
was displaying instead of expected:
Enter value for name placeholder:

[jmolivas]

@davidgrayston Thanks for your contribution, your PR was merged. This will be included on the next release.

[davidgrayston]

Thanks! 👍