Update kube-router to 0.3.1

[combor]

Bump kube-router version to v 0.3.1. This version includes various security fixes and performance improvements.

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Hi @combor. Thanks for your PR.

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[combor]

I think we can close #7026 as this one replicates it but I have signed the CLA.

[rifelpet]

Thanks for the contribution!

You'll need to update the version defined here so that Kops knows to apply the new version of the manifest:

kops/upup/pkg/fi/cloudup/bootstrapchannelbuilder.go

Line 962 in 44723c3

version := "0.1.1-kops.3"

0.3.1-kops.1

/ok-to-test

[combor]

Sure, done.

[combor]

Hi, Is this OK to go ?

[justinsb]

Thanks @combor!

/approve
/lgtm

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: combor, justinsb

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