apis/v1alpha2: fix GatewayClass controllerName print column

[skriss]

Signed-off-by: Steve Kriss [email protected]

What type of PR is this?

/kind bug

What this PR does / why we need it:
Fixes the JSONPath for the gateway class controllerName print column in the v1alpha2 API.

Which issue(s) this PR fixes:

Does this PR introduce a user-facing change?:

Fixes a bug where v1alpha2 GatewayClass controller names were not being shown in the output of `kubectl get gatewayclasses`.

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[k8s-ci-robot]

Hi @skriss. Thanks for your PR.

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[robscott]

Good catch, thanks!

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: howardjohn, robscott, skriss

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