Bump dask from 2024.1.1 to 2024.2.1 in /requirements

[dependabot[bot]]

Bumps dask from 2024.1.1 to 2024.2.1.

Commits

• 0496681 bump version to 2024.2.1
• 9ba7a97 Remove flaky fastparquet test (#10948)
• 73c0a97 Enable Aggregation from dask-expr (#10947)
• ff7551b Update tests for assign change in dask-expr (#10944)
• e20ca75 Adjust for pandas large string change (#10942)
• 64bd868 Fix flaky test_describe_empty (#10943)
• 2fe14ab Use Python 3.12 as reference environment (#10939)
• 67ecd26 [Cosmetic] Clean up temp paths in test_config.py (#10938)
• 0e611de [CLI] dask config set and dask config find updates. (#10930)
• 7845983 combine_first when a chunk is full of NaNs (#10932)
• Additional commits viewable in compare view

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[dependabot[bot]]

Superseded by #1050.