Addition of git-delta breaks exitbox on aarch64

[hobthross]

git-delta does not have a release with the expected musl filename

wget https://github.com/dandavison/delta/releases/download/0.18.2/delta-0.18.2-aarch64-unknown-linux-musl.tar.gz
--2026-04-27 13:16:35--  https://github.com/dandavison/delta/releases/download/0.18.2/delta-0.18.2-aarch64-unknown-linux-musl.tar.gz
Resolving github.com (github.com)... 20.26.156.215
Connecting to github.com (github.com)|20.26.156.215|:443... connected.
HTTP request sent, awaiting response... 404 Not Found
2026-04-27 13:16:35 ERROR 404: Not Found.

Related to dandavison/delta#2017