fix: update expected notebook ImageStream count from 11 to 14

[jiridanek]

Summary

• Three new training-hub-universal-* ImageStreams (cpu, cuda, rocm) from the trainer component now carry the opendatahub.io/notebook-image=true label
• Updated expected notebook ImageStream count from 11 to 14 in test and README

Context

Slack thread:

Test plan

• Run test_workbench_imagestreams_health[notebook_imagestreams] against a cluster with the new ImageStreams

🤖 Generated with Claude Code

Summary by CodeRabbit

• Tests
  • Updated ImageStream validation test expectations for notebook-related images, adjusting expected count from 11 to 14.

[github-actions]

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[coderabbitai]

📝 Walkthrough

Walkthrough

Two test files updated to reflect changed ImageStream count expectations: notebook image ImageStreams increased from 11 to 14, while runtime image expectations remain at 7. No logic or control flow modifications.

Changes

Cohort / File(s)	Summary
Test Expectation Updates tests/workbenches/README.md, tests/workbenches/test_imagestream_health.py	Updated expected ImageStream count for notebook-related images from 11 to 14; tag digest and ImportSuccess condition checks unchanged.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

🚥 Pre-merge checks | ✅ 2

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately reflects the main change: updating the expected notebook ImageStream count from 11 to 14, which is the primary modification across both files.
Description check	✅ Passed	The pull request description provides a clear summary, context, and test plan with direct evidence of testing the specific changes made.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix-notebook-imagestream-count

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[jstourac]

I would rather prefer the #1304.

[jstourac]

Closing in favor of #1304