Add cpanato and saschagrunert as reviewers

Signed-off-by: Adolfo García Veytia (Puerco) <[email protected]>

Author: puerco

keps/sig-release/3027-slsa-compliance/kep.yaml

@@ -10,6 +10,8 @@ status: provisional
 creation-date: 2021-10-31
 reviewers:
   - "@tpepper"
+  - "@cpanato"
+  - "@saschagrunert"
 approvers:
   - TBD
 # status: provisional|implementable|implemented|deferred|rejected|withdrawn|replaced