shellcheck-v0.10.0.linux.riscv64.tar.xz is actually gzipped, not xz'd

[scop]

The file shellcheck-v0.10.0.linux.riscv64.tar.xz, 9.41 MB, Jun 30 available at https://github.com/koalaman/shellcheck/releases/tag/v0.10.0 is actually compressed with gzip, not xz. I suggest fixing the filename accordingly, xz -> gz.

[brother]

Edit: not sure how releases are produced... it is indeed a gzip with xz extension and the others are xz with xz extension.

~Build recepie clearly states gzip indeed.~