Fix ROCm TensorFlow repository URL to comply with AIPCC ROCm 6.3.4 base image

[daniellutz]

This PR will fix the repository URL to download the tensorflow-rocm package to match AIPCC's ROCm 6.3 base image.

Self checklist (all need to be checked):

• Ensure that you have run make test (gmake on macOS) before asking for review
• Changes to everything except Dockerfile.konflux files should be done in odh/notebooks and automatically synced to rhds/notebooks. For Konflux-specific changes, modify Dockerfile.konflux files directly in rhds/notebooks as these require special attention in the downstream repository and flow to the upcoming RHOAI release.

Merge criteria:

• The commits are squashed in a cohesive manner and have meaningful messages.
• Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• The developer has manually tested the changes and verified that the changes work

[atheo89]

/build-konflux

[openshift-ci]

@daniellutz: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/images	aee8a02	link	true	/test images

Full PR test history. Your PR dashboard.

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[atheo89]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

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