fix: update expected notebook ImageStream count from 11 to 14

Three new training-hub-universal ImageStreams (cpu, cuda, rocm) from
the trainer component now carry the opendatahub.io/notebook-image=true
label.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: jiridanek

tests/workbenches/README.md

@@ -16,7 +16,7 @@ workbenches/
 
 ### Current Test Suites
 
-- **`test_imagestream_health.py`** - Validates that workbench ImageStreams are properly imported and resolved. Checks correct ImageStream counts, tag digest references (`@sha256:`), and `ImportSuccess` conditions for both notebook images (11 expected) and runtime images (7 expected)
+- **`test_imagestream_health.py`** - Validates that workbench ImageStreams are properly imported and resolved. Checks correct ImageStream counts, tag digest references (`@sha256:`), and `ImportSuccess` conditions for both notebook images (14 expected) and runtime images (7 expected)
 - **`notebook-controller/test_spawning.py`** - Tests basic notebook creation via Notebook CR and validates pod creation. Also tests Auth proxy container resource customization via annotations
 - **`notebook-controller/test_custom_images.py`** - Validates custom workbench images contain required Python packages by spawning a workbench, installing any missing packages, and executing import verification
 

tests/workbenches/test_imagestream_health.py

@@ -176,7 +176,7 @@ def _validate_imagestreams_with_label(
 @pytest.mark.parametrize(
     "label_selector, expected_imagestream_count",
     [
-        pytest.param("opendatahub.io/notebook-image=true", 11, id="notebook_imagestreams"),
+        pytest.param("opendatahub.io/notebook-image=true", 14, id="notebook_imagestreams"),
         pytest.param("opendatahub.io/runtime-image=true", 7, id="runtime_imagestreams"),
     ],
 )