Fixed CODEOWNERS group for certificates. (#8895)

Author: PawelWMS

.github/CODEOWNERS

@@ -95,4 +95,4 @@
 /toolkit/scripts/toolchain/create_toolchain_in_container.sh @microsoft/cbl-mariner-admins
 
 # Modifications to the trusted CA certificates require admin approval.
-/SPECS/*ca-certificates*/*
+/SPECS/*ca-certificates*/* @microsoft/cbl-mariner-admins