chore: update PULL_REQUEST_TEMPLATE.md

[jacoobes]

Plugin Submission Checklist

Before submitting your plugin, please ensure that you have followed the specifications below:

• Your plugin code includes a JSDoc block with @plugin at the beginning and @end at the end.
• The order of plugin metadata within the JSDoc block follows the structure provided:
  1. @plugin
  2. description
  3. @author (you can have multiple authors in this format: @author @jacoobes [<@182326315813306368>])
  4. @version (with the version number)
  5. @example (a nice example of how to use your plugin)
  6. @end

Plugin Submission Details

Description:

[Please provide a brief description of your plugin here.]

Authors:

[List the authors of the plugin along with their Discord IDs in the format @username [<@discord_id>]. You can add multiple authors in this manner.]

Version:

[Specify the version number of your plugin.]

Example:

[Provide an example of how your plugin can be used here.]

Additional Notes

[Include any additional information or notes you'd like to provide regarding your plugin submission.]