log/console_adapter: Fix wrong severity to use

Signed-off-by: Takuro Ashie <ashie@clear-code.com>

lib/fluent/log/console_adapter.rb

@@ -59,7 +59,7 @@ def call(subject = nil, *arguments, name: nil, severity: 'info', **options, &blo
         @io.seek(0)
         @io.truncate(0)
         super
-        @logger.send(severity, @io.string.chomp)
+        @logger.send(level, @io.string.chomp)
       end
     end
   end