Update sb keys (#1144)

* Update pe_signing_cert in platforms

* Update platform_flavor

Author: eabdullin1

reference_data/platform_flavors.yaml

@@ -804,7 +804,7 @@
   data:
      mock:
        secure_boot_macros:
-         "%pe_signing_cert": "05"
+         "%pe_signing_cert": "06"
          "%pe_signing_token": "AlmaLinux OS Foundation"
   repositories:
     - name: almalinux-10-beta