net-mgmt/ping_exporter: Update to 1.1.0

ChangeLog: https://github.com/czerwonk/ping_exporter/releases/tag/1.1.0

 * bump golang.org/x/net from 0.5.0 to 0.7.0
 * Feature: disable ipv4 addresses
 * implement custom labels for targets
 * auto discover targets using tailscale API

PR:		275628
Reported by:	drtr0jan@yandex.ru
Approved by:	jp+ports@supplntr.io (maintainer, timeout > 2 weeks)