Update link for linode cloud manager

[phillc]

This PR updates a link from Linode classic manager to Linode cloud manager.

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[Raffo]

@phillc can you sign the cla?

[phillc]

I’m trying to track down the owner of Linode’s CCLA account. It may take me a few days.

[phillc]

I signed it

[njuettner]

/lgtm
/approve

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: njuettner, phillc

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