Update to 0.6.0

Changelog:

0.6.0:
-Add constLabels support via cli arg/env variable.

0.5.0:
-Set user agent on scrape requests to nginx.
-Add ability to scrape and listen on unix domain sockets.
-Add location zone and resolver metric support.
-Fix typo in stream_zone_sync_status_nodes_online metric description.
-Do not assume default datasource in Grafana panels.
-Set correct nginx_up query and instance variable expression.

PR: 244896
Reported by: Volodymyr Kostyrko <arcade@b1t.name> (maintainer)
Sponsored by: Netzkommune GmbH