fix respawn position being inside top block

[user622628252416]

Description

Add one to the y coordinate of the respawn position so players spawn on top of the top block rather than iside of it.

Testing

• use /kill
• observe not being inside of a block

Checklist

Things need to be done before this Pull Request can be merged.

• [x] Code is well-formatted and adheres to project style guidelines: cargo fmt
• [x] Code does not produce any clippy warnings cargo clippy

[user622628252416]

This should fix the respawning part of #286, but not the falling through the world part

[Snowiiii]

Looks good. Thanks @user622628252416 :D