Update sigs.yaml

Co-authored-by: Petr Muller <[email protected]>

Author: michelle192837

sigs.yaml

@@ -3241,6 +3241,7 @@ sigs:
     - github: petr-muller
       name: Petr Muller
       company: Red Hat
+      email: [email protected]
   - name: sig-testing
     description: |
       Home for SIG Testing discussion and documents.