scripts/vmstate-static-checker.py: Add new hpet entry for num_timers

The old "num_timers" got a rename.  See commit 1433e38cc8 ("hpet: do not
overwrite properties on post_load") for more details.  Teach the script to
accept the new name.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Thomas Huth <thuth@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Link: https://lore.kernel.org/r/20250501151235.636709-1-peterx@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
diff --git a/scripts/vmstate-static-checker.py b/scripts/vmstate-static-checker.py
index 25aca83..2335e25 100755
--- a/scripts/vmstate-static-checker.py
+++ b/scripts/vmstate-static-checker.py
@@ -91,6 +91,7 @@
                       'mem_win_size', 'mig_mem_win_size',
                       'io_win_addr', 'mig_io_win_addr',
                       'io_win_size', 'mig_io_win_size'],
+        'hpet': ['num_timers', 'num_timers_save'],
     }
 
     if not name in changed_names: