selftests: drv-net: Fix "envirnoments" to "environments"

Fix misspelling reported by codespell

Signed-off-by: Sumanth Gavini <sumanth.gavini@yahoo.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250516225156.1122058-1-sumanth.gavini@yahoo.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>