Fix PaperMC API URL and update jar download command

[typegaro]

Summary of changes:

• Updated the PaperMC API URL to ensure compatibility with the current API endpoint.
• Fixed the wget command to download the server jar from the correct URL.

Reasoning:

• The previous URL (https://papermc.io/api/v2/projects/paper) was incorrect and needed to be updated to the correct endpoint (https://api.papermc.io/v2/projects/paper).
• The wget command was updated to ensure the correct file is downloaded without specifying the output jar name, as it is handled correctly by the API.

This fix ensures that the server jar is downloaded correctly for the specified Minecraft version.

Testing:

• I tested the changes by running the script and verifying that the correct server jar is downloaded from the updated API.

[Project516]

This (https://docs.papermc.io/misc/downloads-api/) is the papermc docs on the download api and there is a new way to download files.https://fill.papermc.io/v3/projects