Build: Bump fsspec from 2026.2.0 to 2026.4.0

[dependabot]

Bumps fsspec from 2026.2.0 to 2026.4.0.

Commits

• 8fdedd1 Merge branch 'master' of https://github.com/fsspec/filesystem_spec
• 8205d0d Release (#2027)
• 50bfba2 Merge branch 'master' of https://github.com/fsspec/filesystem_spec
• f58bc85 Revert "DEP: de-duplicate and sort optional dependencies (#2021)" (#2026)
• c6c7b40 Revert "DEP: de-duplicate and sort optional dependencies (#2021)"
• 3bc67f8 DEP: de-duplicate and sort optional dependencies (#2021)
• 0b290bf docs: add URL handling note to HTTPFileSystem class docstring (#2024)
• b33a2d6 ci: install downstream systems like gcsfs before testing so the _version.py...
• e9e7a5b Delegate DirFileSystem delete and write_text (#2022)
• 105d614 fix: use encode_url() in _pipe_file for consistency (#2023)
• Additional commits viewable in compare view

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[ebyhr]

Opened a new PR #3490 to fix:

==================================== ERRORS ====================================
__________ ERROR collecting tests/notebooks/test_pyiceberg_example.py __________
.venv/lib/python3.14/site-packages/google_crc32c/__init__.py:25: in <module>
    from google_crc32c import cext as impl
.venv/lib/python3.14/site-packages/google_crc32c/cext.py:20: in <module>
    from google_crc32c._crc32c import extend  # type: ignore
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
E   ModuleNotFoundError: No module named 'google_crc32c._crc32c'

During handling of the above exception, another exception occurred:
tests/notebooks/test_pyiceberg_example.py:21: in <module>
    import papermill as pm
.venv/lib/python3.14/site-packages/papermill/__init__.py:2: in <module>
    from .execute import execute_notebook  # noqa: F401
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.venv/lib/python3.14/site-packages/papermill/execute.py:5: in <module>
    from .engines import papermill_engines
.venv/lib/python3.14/site-packages/papermill/engines.py:12: in <module>
    from .iorw import write_ipynb
.venv/lib/python3.14/site-packages/papermill/iorw.py:45: in <module>
    from gcsfs import GCSFileSystem
.venv/lib/python3.14/site-packages/gcsfs/__init__.py:15: in <module>
    from .core import GCSFileSystem
.venv/lib/python3.14/site-packages/gcsfs/core.py:35: in <module>
    from .zb_hns_utils import DEFAULT_CONCURRENCY, MAX_PREFETCH_SIZE
.venv/lib/python3.14/site-packages/gcsfs/zb_hns_utils.py:6: in <module>
    from google.cloud.storage.asyncio.async_appendable_object_writer import (
.venv/lib/python3.14/site-packages/google/cloud/storage/asyncio/async_appendable_object_writer.py:27: in <module>
    from . import _utils
.venv/lib/python3.14/site-packages/google/cloud/storage/asyncio/_utils.py:15: in <module>
    import google_crc32c
.venv/lib/python3.14/site-packages/google_crc32c/__init__.py:29: in <module>
    warnings.warn(_SLOW_CRC32C_WARNING, RuntimeWarning)
E   RuntimeWarning: As the c extension couldn't be imported, `google-crc32c` is using a pure python implementation that is significantly slower. If possible, please configure a c build environment and compile the extension
=========================== short test summary info ============================
ERROR tests/notebooks/test_pyiceberg_example.py - RuntimeWarning: As the c extension couldn't be imported, `google-crc32c` is using a pure python implementation that is significantly slower. If possible, please configure a c build environment and compile the extension
!!!!!!!!!!!!!!!!!!!!!!!!!! stopping after 1 failures !!!!!!!!!!!!!!!!!!!!!!!!!!!
============================== 1 error in 13.89s ===============================

https://github.com/apache/iceberg-python/actions/runs/27445918779/job/81130725813?pr=3489

[Fokko]

Closing in favor of #3490, thanks @ebyhr

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