testing/nsnake: revert incorrect change
Commit 2cf43242 was introduced incorrectly changing entirely the software to an irrelevant one of same name.
This introduces a mandatory downgrade as the other software has different versions.
https://git.alpinelinux.org/aports/commit/?id=2cf432429d5245759d052ff3ff2be808135a6a37
Commit author was @Leo who changed the aport without any approval.