Fix typo in README.md of getting started

[hnts]

Changes

I fixed typo in README.md of getting-started.

mimimum -> minimum

Please review this pull request :)

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[linux-foundation-easycla]

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• ✅ hnts (0cbab5c)

[tekton-robot]

Hi @hnts. 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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[dibyom]

/ok-to-test

[dibyom]

Thank you @hnts would you mind signing the CLA?

[hnts]

@dibyom
I signed the CLA!

[savitaashture]

Thank you @hnts

/lgtm

[dibyom]

/approve

[tekton-robot]

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