Source code version wasn't updated.

[MrGreensWorkshop]

Please check these items before go any further

• [X] I have watched Mr. Green theme tutorials playlist on YouTube.
• [X] I have searched the existing Issues.
• [X] I have searched the existing Discussions.
• [X] I have checked jekyll docs and the answer was not there.
• [X] I have tested in one of these browsers; Safari, Chrome, Firefox. (This project hasn't been tested in other browsers.)

Are you sure this is a bug?

• [X] I'm sure this is definitely a bug.

Describe the bug

The version written in source files is 1.1.0. The current release version is 1.2.1.

Expected Behavior

release version should be 1.2.1.

Steps To Reproduce

-

Which browser have you used?

• [ ] Chrome
• [ ] Safari
• [ ] Firefox
• [ ] Other browsers (This project hasn't been tested in other browsers.)

Which device have you used?

• [ ] Desktop
• [ ] Mobile IOS
• [ ] Mobile Android
• [ ] Other platforms (This project hasn't been tested in other devices.)

Anything else?

I think I will remove version information because, even if I automate this, it creates many differences with forked repositories. so it is not nice.