Use golang 1.17.3 in contrib/tkn-image/Dockerfile

[mattysweeps]

Changes

• Bump the default GOLANG_VERSION to 1.17.3
  The image was not building with the existing default value, 1.13.* due
  to the use of embeded files

TESTED:

docker build --file=contrib/tkn-image/Dockerfile --target=tkn --tag tkn:latest .

Submitter Checklist

These are the criteria that every PR should meet, please check them off as you
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• Includes tests (if functionality changed/added)
• Run the code checkers with make check
• Regenerate the manpages, docs and go formatting with make generated
• Commit messages follow commit message best practices

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Release Notes

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: mattysweeps / name: Matthew Broomfield (cf6affe)

[tekton-robot]

Hi @mattysweeps. 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.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[piyush-garg]

@mattysweeps Currently the Dockerfile in this repo is not getting used, the one which is getting used is https://github.com/tektoncd/plumbing/blob/main/tekton/images/tkn/Dockerfile

[tekton-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: vdemeester

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[bendory]

/ok-to-test

[bendory]

/lgtm
but robot doesn't like me yet 😿

[tekton-robot]

@bendory: changing LGTM is restricted to collaborators

In response to this:

/lgtm
but robot doesn't like me yet 😿

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[vdemeester]

/lgtm

[bendory]

/retest-required

[piyush-garg]

/retest
/lgtm