Change signal used to generate Guru Meditation Reports for Nova
Change signal used to generate Guru Meditation Reports for Nova

Recently [1], the signal used to trigger oslo.reports feature changed
from USR1 to USR2. Update the docs to reflect that.

[1] https://github.com/openstack/oslo.reports/commit/45b1c02d113051d147e54ef921ce8e94135542d8

Change-Id: I11679d1f5c96103b1650cb9e4189dae23d573553

openstack/openstack-manuals,openstack/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,openstack/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,openstack/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals