build(deps): bump santhosh-tekuri/jsonschema/v5 to v6

[alexandear]

santhosh-tekuri/jsonschema@v6.0.0-beta1...v6.0.1

It's impossible to compare v5 and v6 on GitHub because "There isn’t anything to compare. v5.3.1 and v6.0.1 are entirely different commit histories".

Used the following commands for tests:

$ go run ./cmd/golangci-lint config verify

$ go run ./cmd/golangci-lint config verify --schema jsonschema/golangci.jsonschema.json
$ echo $?
0

$ go run ./cmd/golangci-lint config verify -c .golangci.next.reference.yml --schema ./jsonschema/golangci.next.jsonschema.json

jsonschema: "linters-settings.goheader" does not validate with "/properties/linters-settings/properties/goheader/oneOf": "oneOf failed, subschemas 0, 1 matched"
jsonschema: "linters-settings.custom.example" does not validate with "/properties/linters-settings/properties/custom/patternProperties/%5E.%2A$/oneOf": "oneOf failed, subschemas 0, 1 matched"
Failed executing command with error: the configuration contains invalid elements
exit status 3

$ go run ./cmd/golangci-lint config verify --schema https://raw.githubusercontent.com/golangci/golangci-lint/master/jsonschema/golangci.next.jsonschema.json
$ echo $?
0

$ go run ./cmd/golangci-lint config verify
Failed executing command with error: [.golangci.yml] validate: compile schema: failing loading "https://raw.githubusercontent.com/golangci/golangci-lint/unknown/jsonschema/golangci.next.jsonschema.json": https://raw.githubusercontent.com/golangci/golangci-lint/unknown/jsonschema/golangci.next.jsonschema.json returned status code 404
exit status 3

This update is done by hand because dependabot is not able to handle major version.

[ldez]

LGTM