fix(deps): update rust crate proc-macro2 to 1.0.80

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
proc-macro2	dependencies	patch	1.0.79 -> 1.0.80

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Release Notes

dtolnay/proc-macro2 (proc-macro2)

v1.0.80

Compare Source

• Add Literal::byte_character constructor (#​449)
• Add Literal::c_string constructor #​450)

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