fix(deps): update rust crate proc-macro2 to v1.0.91

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
proc-macro2	dependencies	patch	1.0.89 -> 1.0.91

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Release Notes

dtolnay/proc-macro2 (proc-macro2)

v1.0.91

Compare Source

• Fix panic "compiler/fallback mismatch 949" when using TokenStream::from_str from inside a proc macro to parse a string containing doc comment (#​484)

v1.0.90

Compare Source

• Improve error recovery in TokenStream's and Literal's FromStr implementations to work around https://github.com/rust-lang/rust/issues/58736 such that rustc does not poison compilation on codepaths that should be recoverable errors (#​477, #​478, #​479, #​480, #​481, #​482)

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[github-actions]

GNU testsuite comparison:

Skip an intermittent issue tests/timeout/timeout (fails in this run but passes in the 'main' branch)