[release-1.4] update CAPI to 1.4.8

[cpanato]

What this PR does / why we need it:

• update CAPI to 1.4.8

/kind feature cleanup

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

Special notes for your reviewer:

Documentation:

Release note:

update CAPI to 1.4.8

[k8s-ci-robot]

@cpanato: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-cluster-api-provider-digitalocean-lint-release-1-4	d8de53d	link	true	/test pull-cluster-api-provider-digitalocean-lint-release-1-4

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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[cpanato]

/override pull-cluster-api-provider-digitalocean-lint-release-1-4

[cpanato]

/assign @timoreimann @gottwald

[gottwald]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cpanato, gottwald

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• OWNERS [cpanato,gottwald]

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[cpanato]

@gottwald need a /lgtm

[gottwald]

/lgtm