Bump FreeBSD in CI to v13.3 #749

Job	Run time
cross (ubuntu-latest)	1m 42s
test (ubuntu-latest, nightly)	40s
cross (macos-latest)	1m 7s
test (ubuntu-latest, beta)	39s
fmt	4s
clippy	15s
test (ubuntu-latest, stable)	32s
msrv (ubuntu-latest)	30s
test (windows-latest, nightly)	1m 44s
windows_gnu (nightly, x86_64-pc-windows-gnu)	1m 36s
msrv (windows-latest)	1m 6s
test (windows-latest, beta)	1m 16s
test (windows-latest, stable)	1m 18s
test (macos-latest, nightly)	55s
security_audit	7s
test (macos-latest, beta)	42s
test (macos-latest, stable)	36s
	14m 49s

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