[Digest Updater Action] Update notebook's imageStreams image tag to digest format

[github-actions]

🚀 This is an automated Pull Request.

This PR updates the manifests/base/params.env file with the latest updated SHA digests of the notebooks (N & N-1).
Created by /.github/workflows/notebooks-digest-updater-upstream.yaml

❗ IMPORTANT NOTE: Remember to delete the digest-updater-6934988015 branch after merging the changes

The images of Nth is based on: 7d78e4d
N-1 is based on: 470d695
Related-to: #329

[openshift-ci]

Hi @github-actions[bot]. Thanks for your PR.

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[harshad16]

/ok-to-test
/lgtm
/approve

[openshift-ci]

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This pull-request has been approved by: harshad16

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