Java CI Small Fix

[DartPower]

• Update checkout module
• Increment Java JDK version
• Add artifact upload
• Test older mc versions with newest java
• Test artifact target path correctly or not too much (i guess it's OK)

This is very small fix but i think it's helpful :)

[datatags]

I'm not familiar with GitHub actions, but is there a way to provide multiple Java versions for compiling? I believe UC requires Java 8, 16, and 17 to compile correctly. This is a step in the right direction though 🙂

[DartPower]

I'm too not much expert in Github Actions but i have a two ideas: (and/or)

1. You can split repo in multiple branches by version and edit in workflow file branch trigger by branch.
2. You can create multiple workflow files with each java version.

Just example, but useful.
And also i can find method to cross-compile by java version.

[datatags]

I'll just merge this and poke around a little. Let me know if you have any other thoughts. Thanks! :)