Bump snafu from 0.8.3 to 0.8.4

[dependabot[bot]]

Bumps snafu from 0.8.3 to 0.8.4.

Changelog

Sourced from snafu's changelog.

0.8.4 - 2024-07-08

Fixed

• Use the fully-qualified path to Location in the location!() macro.

Commits

• ff76054 Release 0.8.3
• d3c0052 Update the changelog
• 9a0e9a1 Merge pull request #456 from discord9/macro_full_path
• 298b3c3 Use full path for location!() macro
• 1b559a5 Merge pull request #459 from shepmaster/maint
• e36f4d8 Use the unused test struct
• 3335331 error-in-core is stabilized in 1.81 (nightly)
• See full diff in compare view

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[dependabot[bot]]

Looks like snafu is up-to-date now, so this is no longer needed.