RuntimeConfig: Update logger fields for runtime updates

[oxzi]

When updating a channel name within the web UI, the logs are still using the old name. This happens because the logger is created within the createFn but not altered/recreated in the updateFn.

icinga-notifications/internal/config/channel.go

Lines 15 to 17 in 860ea0c

	newElement.Start(context.TODO(), r.logs.GetChildLogger("channel").With(
	zap.Int64("id", newElement.ID),
	zap.String("name", newElement.Name)))

icinga-notifications/internal/config/channel.go

Lines 20 to 27 in 860ea0c

	func(curElement, update *channel.Channel) error {
	curElement.ChangedAt = update.ChangedAt
	curElement.Name = update.Name
	curElement.Type = update.Type
	curElement.Config = update.Config
	curElement.Restart()
	return nil
	},

This pattern should be checked for each runtime update, not only for channels.

Reported by @sukhwinder33445, thanks!