allow smg247 and stbenjam to use backports labels in openshift/kubernetes for OTE purposes (#67622)

Author: smg247

core-services/prow/02_config/openshift/kubernetes/_pluginconfig.yaml

@@ -80,6 +80,8 @@ label:
       - p0lyn0mial
       - soltysh
       - tkashem
+      - smg247
+      - stbenjam
       label: backports/validated-commits
     - allowed_teams:
       - openshift-staff-engineers
@@ -89,6 +91,8 @@ label:
       - p0lyn0mial
       - soltysh
       - tkashem
+      - smg247
+      - stbenjam
       label: backports/unvalidated-commits
 plugins:
   openshift/kubernetes: