Land rapid7#19449, Fix an exception when the target is not Ubuntu

Author: dledda-r7

modules/exploits/linux/local/cve_2022_0995_watch_queue.rb

@@ -90,7 +90,7 @@ def module_check
       fail_with(Failure::BadConfig, 'DEBUG_PRINT is only supported when COMPILE is set to True')
     end
     unless kernel_version =~ /[uU]buntu/
-      fail_with(Failure::NoTarget, "Unsupported Distro: '#{version}'")
+      fail_with(Failure::NoTarget, "Unsupported Distro: '#{kernel_version}'")
     end
     arch = kernel_hardware
     unless arch.include?('x86_64')