Modifying Spelling 제작년, Remove poorly used expressions

[yangs1202]

Pull Request Checklist

Thank you for taking the time to improve Arrow! Before submitting your pull request, please check all appropriate boxes:

• 🧪 Added tests for changed code.
• 🛠️ All tests pass when run locally (run tox or make test to find out!).
• 🧹 All linting checks pass when run locally (run tox -e lint or make lint to find out!).
• 📚 Updated documentation for changed code.
• ⏩ Code is up-to-date with the master branch.

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Description of Changes

• The expression '그끄제' is rarely used in Korean expressions. Instead, the expression '3일전' is more natural.
• I've corrected the spelling. '재작년', not '제작년', is the right expression.

[yangs1202]

@jadchaar Hello? Please check this PR.

[krisfremen]

LGTM

[yangs1202]

Hello, @jadchaar
First of all, thank you for making a good open source.

I am using this library very well in Korea,
I'm curious about the next release schedule.

Recently, I think you merged something similar with the master.
I'm sorry if it's rude.

Then I'll wait for your reply. Have a good day.