build(deps): bump dask from 2026.6.0 to 2026.7.1

[dependabot]

Bumps dask from 2026.6.0 to 2026.7.1.

Release notes

Sourced from dask's releases.

2026.7.1

Changes

• No changes

See the Changelog for more information.

2026.7.0

Changes

• Avoid NumPy 2.5 type stubs @​crusaderky (#12483)
• Bump prefix-dev/setup-pixi from 0.9.6 to 0.10.0 @dependabot[bot] (#12478)
• Bump actions/cache from 5 to 6 @dependabot[bot] (#12479)
• Avoid graph materialization in is_dask_collection for expr wrappers @​mrocklin (#12476)
• Fix randomly failing s3fs checkouts in nightly CI @​crusaderky (#12474)
• Bump actions/checkout from 6 to 7 @dependabot[bot] (#12473)
• Pin pandas 3 nightlies @​crusaderky (#12469)
• CI: Suppress numpy 'generic' timedelta deprecation from pandas @​crusaderky (#12468)
• Free-threading: Use upstream msgpack @​crusaderky (#12467)
• Support composite expressions with __dask_exprs__ protocol @​mrocklin (#12457)
• Pytest 9.1 support @​crusaderky (#12465)
• CI: Suppress warning about slow disk @​crusaderky (#12464)
• XFAIL test_concat_categorical (again) @​crusaderky (#12463)
• Fix release publisher warnings @​mrocklin (#12456)
• Bump actions/download-artifact from 7 to 8 @dependabot[bot] (#12461)
• Upgrade pixi @​mrocklin (#12460)

See the Changelog for more information.

Commits

• 154e677 Version 2026.7.1
• e0be880 Version 2026.7.0
• e237122 Avoid NumPy 2.5 type stubs (#12483)
• b73c0f9 Bump prefix-dev/setup-pixi from 0.9.6 to 0.10.0 (#12478)
• caaeb48 Bump actions/cache from 5 to 6 (#12479)
• 6c8edce Avoid graph materialization in is_dask_collection for expr wrappers (#12476)
• cdc219f Fix randomly failing s3fs checkouts in nightly CI (#12474)
• 819a679 Bump actions/checkout from 6 to 7 (#12473)
• c9d1df3 Pin pandas 3 nightlies (#12469)
• fb9e26c CI: Suppress numpy 'generic' timedelta deprecation from pandas (#12468)
• Additional commits viewable in compare view

[codspeed-hq]

Merging this PR will regress 1 benchmark

⚠️ Different runtime environments detected

Some benchmarks with significant performance changes were compared across different runtime environments,
which may affect the accuracy of the results.

Open the report in CodSpeed to investigate

⚡ 3 improved benchmarks
❌ 1 regressed benchmark
✅ 171 untouched benchmarks
⏩ 175 skipped benchmarks¹

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	Memory	test_to_lp[nodal_balance-severity=0]	2.8 MB	3.4 MB	-17.6%
⚡	Memory	test_to_lp[knapsack-n=10000]	2.6 MB	1.7 MB	+56.88%
⚡	Memory	test_to_lp[masked-n=100]	2.7 MB	2.1 MB	+28.97%
⚡	Memory	test_to_lp[milp-n=50]	2.6 MB	2.1 MB	+28.06%

Tip

Investigate this regression by commenting @codspeedbot fix this regression on this PR, or directly use the CodSpeed MCP with your agent.

---

_{Comparing dependabot/pip/dask-2026.7.1 (dba2e0e) with master (0f6cdad)²}

Footnotes

1. 175 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

2. No successful run was found on master (81d083c) during the generation of this report, so 0f6cdad was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩