Update links on https://snapcraft.io/concierge

[dimaqq]

Tool has moved from jnsgruk to canoical, yet the links remain

Release seems to be done via

concierge/.goreleaser.yaml

Lines 28 to 57 in a0dda2d

	snapcrafts:
	- name: concierge
	publish: true
	license: Apache-2.0
	base: core24
	confinement: classic
	grade: stable
	summary: A utility for configuring dev/test machines for charm development
	description: |
	concierge is an opinionated utility for provisioning charm development and testing machines.
	Its role is to ensure that a given machine has the relevant "craft" tools and providers
	installed, then bootstrap a Juju controller onto each of the providers. Additionally, it can
	install selected tools from the [snap store](https://snapcraft.io) or the Ubuntu archive.
	Configuration is by flags/environment variables, or by configuration file. The configuration file
	must be in the current working directory and named 'concierge.yaml', or the path specified using
	the '-c' flag.
	There are 3 presets available by default: 'machine', 'k8s' and 'dev'.
	Some aspects of presets and config files can be overridden using flags such as '--juju-channel'.
	Each of the override flags has an environment variable equivalent, such as
	'CONCIERGE_JUJU_CHANNEL'.
	More information at https://github.com/canonical/concierge.
	extra_files:
	- source: .github/concierge.png
	destination: concierge.png
	mode: 0644

That doesn't reference jnsgruk, so I'm not sure where the source of truth is.