Update Rust crate syn to v2.0.93

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
syn	dependencies	patch	2.0.91 -> 2.0.93

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Release Notes

dtolnay/syn (syn)

v2.0.93

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• Fix expression parsing edge cases: x as T <<= y (#​1804), break as T (#​1805), match x { _ if .. => {} } (#​1807)
• Fix expression printing edge cases: || -> T 'a: {} (#​1806), if break x {} (#​1808, #​1810)

v2.0.92

Compare Source

• Fix parenthesization of jumps inside ranges (#​1798)

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