chore: Bump syn from 2.0.71 to 2.0.77

[dependabot[bot]]

Bumps syn from 2.0.71 to 2.0.77.

Release notes

Sourced from syn's releases.

2.0.77

• Support parsing Expr::Tuple in non-"full" mode (#1727)

2.0.76

• Enforce that tail call become keyword is followed by an expression (#1725)

2.0.75

• Automatically fill in missing turbofish when printing ExprPath and other paths in expression position (#1722)

2.0.74

• Fix "temporary is dropped and runs the destructor for type `impl Iterator`" regression affecting certain use of Generics iterator methods (#1719)

2.0.73

• Support parsing unnamed C varargs within function pointer types (#1711)
• Improve synthesized error message on unexpected tokens at the end of the expected contents of a delimited group (#1713)
• Support parsing unstable tail call syntax (#1714, rust-lang/rust#112788)
• Add Fields::members iterator (#1716, thanks @​Fancyflame)

2.0.72

• Parse use<'a, T> precise capturing bounds (#1707, thanks @​compiler-errors)

Commits

• 6232266 Release 2.0.77
• 97acbf0 Merge pull request #1727 from dtolnay/exprparen
• a3b5a5c Support parsing Expr::Tuple in derive
• 3c24f57 Run upload-artifact action regardless of previous step failure
• 78608a3 Upload CI Cargo.lock for reproducing failures
• ef3e9c6 Release 2.0.76
• 8f7365f Merge pull request #1725 from dtolnay/tailcall
• 6cddd9e Make tail call expr mandatory
• d1746fe Release 2.0.75
• b693682 Merge pull request #1722 from dtolnay/exprpath
• Additional commits viewable in compare view

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[wmmc88]

@dependabot rebase