[develop] Github Actions is attempting to save `-nosave` tests

[anjakefala]

These tests run to check that plotting workflows run without exceptions.

I have them turned off (https://github.com/saulpw/visidata/commit/72c6534e8397fe23ef61c49de1ee156f5b5dea51), so we can evaluate the other elements of the build.

Current clues:

dev/test.sh shell: /usr/bin/bash --noprofile --norc -e -o pipefail {0}

shopt -s failglob
trap 'echo aborted; exit;' SIGINT SIGTERM

bin/vd --play tests/graph-cursor-nosave.vd --batch --config tests/.visidatarc --visidata-dir tests/.visidata saving 1 sheets to - as tsv