update: bumped driverkit to 0.15.1.

[FedeDP]

What type of PR is this?

/kind cleanup

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/area build

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Which issue(s) this PR fixes:

Fixes #

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Does this PR introduce a user-facing change?:

NONE

[poiana]

@FedeDP: The label(s) kind/cleanup, area/build cannot be applied, because the repository doesn't have them.

In response to this:

What type of PR is this?

/kind cleanup

Any specific area of the project related to this PR?

/area build

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

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[poiana]

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[maxgio92]

Thanks @FedeDP

/approve

[poiana]

[APPROVALNOTIFIER] This PR is APPROVED

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