chore: update rust crate proc-macro2 to v1.0.103

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
proc-macro2	workspace.dependencies	patch	1.0.95 -> 1.0.103

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Release Notes

dtolnay/proc-macro2 (proc-macro2)

v1.0.103

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• Add semver-exempt Literal methods str_value, cstr_value, byte_str_value (#​525)

v1.0.102

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• Fix interaction of Display impls for TokenStream and Ident with formatting specifiers for padding, alignment, width (#​523, #​524)

v1.0.101

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• Optimize Span location accessors (#​519)

v1.0.100

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• Stabilize Span methods on Rust 1.88+: start, end, line, column, file, local_file (#​517, #​518)

v1.0.99

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• Prevent Span's unstable API becoming unavailable from a future new compiler lint (#​515)

v1.0.98

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• Disallow prefixed identifier as name of lifetime: 'prefix#lifetime (#​514, rust-lang/rust#126452)

v1.0.97

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• Allow build-script cleanup failure with NFSv3 output directory to be non-fatal (#​505, #​512, thanks @​davvid)

v1.0.96

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• Simplify how rustdoc flags are decided during docs.rs builds (#​511)

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