Add renovate to devfile-resources.github.io

[michael-valdron]

Which area is this issue related to?

/area ci
/area landing-page

Issue Description

In order to keep on top of patching our CI for the landing page deployment and ensure there are no breakages on it, such as #1744, it would be recommended to onboard this repository to use renovate as well for continuous patches for the deployment CI github actions, as we are onboarding our other devfile organizations to use renovate (#1278).

Acceptance Criteria

• Add renovate bot to the devfile-resources.github.io repository or devfile-resources org
• Add renovate configuration to be picked up by organization renovate bot

Target Odo Version

No response

[github-actions]

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