M #-: Fix monitoring for Ubuntu2404 (#3118)

For a small performance penalty, it solves error "can't modify frozen Array"

(cherry picked from commit 3b3fe1ce40)

src/im_mad/remotes/lib/probe_db.rb

@@ -147,7 +147,7 @@ class VirtualMachineDB
         # ----------------------------------------------------------------------
         # check missing VMs
         # ----------------------------------------------------------------------
-        uuids = @db.execute("SELECT uuid FROM #{@dataset}").flatten!
+        uuids = @db.execute("SELECT uuid FROM #{@dataset}").flatten
         uuids ||= []
 
         (uuids - monitor_ids).each do |uuid|