.sync/Files.yml: Sync pull-request-formatting-validator.yml to secureboot_objects (#557)

This workflow is primarily being synced to secureboot_objects to ensure
file sync PR titles are updated from the default string value.

Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>

Author: makubacki

.sync/Files.yml

@@ -492,6 +492,7 @@ group:
       microsoft/mu_rust_helpers
       microsoft/mu_rust_hid
       microsoft/mu_rust_pi
+      microsoft/secureboot_objects
       microsoft/mu_tiano_platforms
 
 # Leaf Workflow - Release Draft