Update pgbouncer_exporter to 0.8.0

Changelog: changed

Author: dependencies.io Bot

config/software/pgbouncer-exporter.rb

@@ -20,7 +20,7 @@
 require "#{Omnibus::Config.project_root}/lib/gitlab/prometheus_helper"
 
 name 'pgbouncer-exporter'
-version = Gitlab::Version.new('pgbouncer-exporter', '0.7.0')
+version = Gitlab::Version.new('pgbouncer-exporter', '0.8.0')
 default_version version.print
 
 license 'MIT'