Update toml requirement from 0.4.10 to 0.5.7 in /benchmarks

[dependabot-preview[bot]]

Updates the requirements on toml to permit the latest version.

Commits

• 9a94610 Bump to 0.5.7
• c74293f Improve error message when parsing unquoted string (#385)
• 940fcf9 Allow delimiter quotes at the end of multiline strings (#393)
• 7a43ac9 Apply some Clippy suggestions. (#378)
• d99f566 Rustdoc: Add links. Show all reexports as reexports. (#377)
• bb675c5 Fix roundtripping of \u001f and \u007f in toml string literals (#372)
• f60e342 Merge pull request #370 from zeenix/fix-typo
• 87fcd65 Fix a small typo in docs
• 436acbd Bump to 0.5.6
• f92c15f Fix a couple errors in DateStrEmitter (#368)
• Additional commits viewable in compare view

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