Fix link rewrites

[AlanGreene]

Changes

Resolves https://github.com/tektoncd/website/issues/500 Resolves https://github.com/tektoncd/website/issues/499

Update the sync script to ensure both links and images are processed for URL rewrites.

/kind bug

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[afrittoli]

/test pull-community-python-unit

[tekton-robot]

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In response to [this](https://github.com/tektoncd/website/pull/501#issuecomment-1410447294): >/test pull-community-python-unit Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes/test-infra](https://github.com/kubernetes/test-infra/issues/new?title=Prow%20issue:) repository.

[tekton-robot]

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[AlanGreene]

Looks like this also resolved https://github.com/tektoncd/website/issues/498 🎉