test

Bump syn from 2.0.69 to 2.0.71 #4863

Job	Run time
tests (blaze/macos-14, stable, std)	12m 45s
check-typos	46s
tests (blaze/macos-14, stable, examples)	4m 24s
tests (blaze/macos-14, 1.75.0, std)	12m 35s
tests (ubuntu-22.04, stable, std)	26m 5s
tests (ubuntu-22.04, stable, no-std)	3m 51s
tests (ubuntu-22.04, stable, examples)	5m 4s
tests (ubuntu-22.04, 1.75.0, std)	19m 53s
tests (ubuntu-22.04, 1.75.0, no-std)	4m 10s
tests (windows-2022, stable, std)	23m 11s
tests (windows-2022, stable, examples)	10m 24s
tests (windows-2022, 1.75.0, std)	25m 13s
	2h 28m 21s

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