configs: Fix "gem5.resource" typo in riscv-ubuntu-run.py

This was causing the Nightly tests to fail:
https://jenkins.gem5.org/job/nightly/348/

The import should be "gem5.resources.workload".

Change-Id: I0ecd181a3c1120c44ebd0683e2a62bdc602a75bd
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/63391
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
1 file changed