deps: update libffi to 3.6.0 #8263

Job	Run time
Build slim tarball	1m 24s
aarch64-linux: Cache V8 build	23s
x86_64-linux: with shared libraries	26m 28s
aarch64-darwin: with shared libraries	24m 14s
x86_64-darwin: with shared libraries	39m 23s
aarch64-linux: with shared openssl-1.1.1w	23m 3s
aarch64-linux: with shared boringssl-0.20260526.0	23m 16s
aarch64-linux: with shared openssl-3.0.20	24m 53s
aarch64-linux: with shared openssl-3.6.2	25m 0s
aarch64-linux: with shared openssl-4.0.0	23m 57s
aarch64-linux: with shared openssl-3.5.6	24m 20s
	3h 56m 21s

Provide feedback