[update] sysutils/telegraf to 1.30.3

Hello,

Here's an update for telegraf that's been working fine on amd64. Other
tests?

changelogs:
https://github.com/influxdata/telegraf/releases/tag/v1.30.1
https://github.com/influxdata/telegraf/releases/tag/v1.30.2
https://github.com/influxdata/telegraf/releases/tag/v1.30.3

Thanks,
Lucas