Bump distributed from 2024.3.1 to 2024.4.0 in /requirements

[dependabot[bot]]

Bumps distributed from 2024.3.1 to 2024.4.0.

Commits

• 3f77d1b bump version to 2024.4.0
• e7f756b Fix GPU Dashboard (#8572)
• e434793 Refresh documentation for annotations and spans (#8593)
• 30d5df7 Fixup deprecation warning from pandas (#8564)
• e72d2b2 Add python 3.11 to GPU CI matrix (#8598)
• abd1539 Deadline to use a monotonic timer (#8597)
• a2db1d9 Update gpuCI RAPIDS_VER to 24.06 (#8588)
• 84213ac Refactor restart() and restart_workers() (#8550)
• 8927bfd Bump actions/checkout from 4.1.1 to 4.1.2 (#8587)
• 843fc3f Fix bokeh deprecations (#8594)
• Additional commits viewable in compare view

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[dependabot[bot]]

Superseded by #1087.