refactor(tvix): point SSL_CERT_FILE to /dev/null r/8357

reqwest wants to be able to read a file of trust roots when constructed,
but as it doesn't actually do any HTTPS connections inside the nix
build, an empty list of trust roots is totally sufficient.

Thankfully /dev/null provides such a file.

Change-Id: I9bd1619b2c9f8ff2a6640d2ac410d4de5b20c2ea
Reviewed-on: https://cl.tvl.fyi/c/depot/+/11961
Autosubmit: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
Reviewed-by: aspen <root@gws.fyi>

0 files changed, 0 insertions, 0 deletions