Update gitlab-org/build/omnibus-mirror/node_exporter from 1.7.0 to 1.8.0

Changelog: changed

Author: dependencies-bot

config/software/node-exporter.rb

@@ -18,7 +18,7 @@
 require "#{Omnibus::Config.project_root}/lib/gitlab/prometheus_helper"
 
 name 'node-exporter'
-version = Gitlab::Version.new('node-exporter', '1.7.0')
+version = Gitlab::Version.new('node-exporter', '1.8.0')
 default_version version.print
 
 license 'APACHE-2.0'