Change default Fulcio URL to match cosign's

[tcnghia]

Currently cosign is using https://v1.fulcio.sigstore.dev as the default. Changing chains to use the same.

Signed-off-by: Nghia Tran tcnghia@gmail.com

[linux-foundation-easycla]

The committers are authorized under a signed CLA.

• ✅ Nghia Tran (d5fd186)

[tekton-robot]

Hi @tcnghia. Thanks for your PR.

I'm waiting for a tektoncd 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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[priyawadhwa]

TY for fixing this!!

So we do have a test for this but unfortunately we can't run it in CI because our CI cluster doesn't have workload identity enabled.

Would you mind running it locally to make sure this passes?

go test -tags=e2e -run TestFulcio ./test/... 

LMK if it doesn't work!

[tcnghia]

@priyawadhwa Thanks for the pointer! The test passed for me

go test -tags=e2e -run TestFulcio ./test/... 

ok  	github.com/tektoncd/chains/test	101.788s

[tekton-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: priyawadhwa

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[priyawadhwa]

/lgtm

[priyawadhwa]

/ok-to-test