Bump syn from 2.0.75 to 2.0.85 in /native #1026

Job	Run time
lint	1m 31s
docs	1m 54s
Rustfmt	16s
Rust unit tests (ubuntu-latest)	2m 39s
Rust unit tests (macos-latest)	1m 59s
Rust unit tests (windows-latest)	4m 0s
test (macos-latest, 3.9)	4m 27s
typecheck	1m 11s
test (macos-latest, 3.10)	3m 51s
test (macos-latest, 3.11)	4m 50s
test (macos-latest, 3.12)	4m 47s
test (macos-latest, 3.13)	4m 17s
test (ubuntu-latest, 3.9)	6m 0s
test (ubuntu-latest, 3.10)	6m 9s
test (ubuntu-latest, 3.11)	6m 31s
test (ubuntu-latest, 3.12)	8m 45s
test (ubuntu-latest, 3.13)	8m 50s
test (windows-latest, 3.9)	7m 46s
test (windows-latest, 3.10)	8m 53s
test (windows-latest, 3.11)	8m 57s
test (windows-latest, 3.12)	10m 44s
test (windows-latest, 3.13)	12m 3s
	2h 0m 20s

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