[Fix] Fix support of disable_monitoring in rbl

src/plugins/lua/rbl.lua

@@ -1074,6 +1074,7 @@ local rule_schema_tbl = {
   process_script = ts.string:is_optional(),
   emails_delimiter = ts.string:is_optional(),
   ignore_defaults = ts.boolean:is_optional(),
+  disable_monitoring = ts.boolean:is_optional(),
   symbols_prefixes = ts.map_of(ts.string, ts.string):is_optional(),
 }
 -- Add default boolean flags to the schema