Fix Swagger UI Catalog example error

[QuanZhang-William]

Prior to this commit, "tektoncd" is used as a showcase example in goa-gen design. This is reflected as default example in the "resouce" section of Swagger UI, which results in 404 issue when trying out the examples with default values. This commit fixes the issue by correcting the default catalog values from "tektoncd" to "tekton"

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[tekton-robot]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[QuanZhang-William]

/test all

[vinamra28]

/retest

[piyush-garg]

/retest

[vinamra28]

/meow
/cc @piyush-garg @PuneetPunamiya

[tekton-robot]

@vinamra28:

In response to this:

/meow
/cc @piyush-garg @PuneetPunamiya

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[tekton-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: vinamra28

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[PuneetPunamiya]

Thanks for the pr, the patch looks fine but I have a small concern about this because we are adding these examples in goa design to showcase user what all values can be added, but for the beginners it might be confusing as well

/lgtm

[vinamra28]

/retest

[QuanZhang-William]

@PuneetPunamiya I have updated the PR description and added some screenshots to show the issue better. Hope this is clearer to beginners like me 😄