[pl] sync with PR 50092

[dkarczmarski]

[pl] sync content/pl/docs/contribute/docs.md with PR 50092

https://github.com/kubernetes/website/pull/50092/files#diff-dddcbe09300e7172a21010f29951cbe1e206faa3bc8569ba1c2698f83e6306b0

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[mfilocha]

/lgtm
/approve

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: 238b4c6e19a8ce2dce1144f8c33776cfb3fd3177

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mfilocha

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