Add kagglehub in kaggle_requirements.txt (#1525)

The sigstore version is now longer in pre-release:
https://pypi.org/project/sigstore/#history

http://b/394382016

Author: rosbo

Dockerfile.tmpl

@@ -19,9 +19,6 @@ RUN uv pip install --system -r /requirements.txt
 # b/183041606#comment5: the Kaggle data proxy doesn't support these APIs. If the library is missing, it falls back to using a regular BigQuery query to fetch data.
 RUN uv pip uninstall --system google-cloud-bigquery-storage
 
-# b/394382016: sigstore (dependency of kagglehub) requires a prerelease packages, installing separate.
-RUN uv pip install --system --force-reinstall --prerelease=allow "kagglehub[pandas-datasets,hf-datasets,signing]>=0.3.12"
-
 # uv cannot install this in requirements.txt without --no-build-isolation
 # to avoid affecting the larger build, we'll post-install it.
 RUN uv pip install --no-build-isolation --system "git+https://github.com/Kaggle/learntools"

kaggle_requirements.txt

@@ -59,6 +59,7 @@ jupyterlab
 jupyterlab-lsp
 kaggle>=1.8.3
 kaggle-environments
+kagglehub[pandas-datasets,hf-datasets,signing]>=0.4.2
 keras-cv
 keras-nlp
 keras-tuner