Fixing broken link to spec page

[oldgiova]

What type of PR is this?
/kind documentation

What this PR does / why we need it:
Fixes broken link to spec page (404) and now sends to https://gateway-api.sigs.k8s.io/v1alpha2/references/spec/

Which issue(s) this PR fixes:
none

Does this PR introduce a user-facing change?:

NONE

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[k8s-ci-robot]

Hi @rgiovanardi. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[oldgiova]

Signed in as CLA

[hbagdi]

@rgiovanardi Can you please sign the CLA?

/ok-to-test
/lgtm

I'm not sure if this should point to v1alpha1 or v1alpha2. alpha2 seems fine so go ahead

[oldgiova]

@rgiovanardi Can you please sign the CLA?

/ok-to-test
/lgtm

I'm not sure if this should point to v1alpha1 or v1alpha2. alpha2 seems fine so go ahead

Hi @hbagdi I should have signed the CLA now. Thanks

[robscott]

Thanks!

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: rgiovanardi, robscott

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