chore(deps): update external/libsodium digest to 3c6da4b #146

Job	Run time
lib_android (monero)	24m 30s
lib_android (wownero)	25m 33s
lib_linux (monero)	29m 4s
lib_linux (wownero)	28m 12s
lib_mingw (monero)	3m 21s
lib_mingw (wownero)	3m 4s
lib_darwin (monero)	13m 18s
lib_darwin (wownero)	13m 27s
macos build (monero)	3m 12s
lib_sailfishos_aarch64 (monero)	3m 12s
macos build (wownero)	3m 21s
lib_sailfishos_aarch64 (wownero)	2m 52s
lib_sailfishos_i486 (monero)	2m 0s
lib_sailfishos_i486 (wownero)	1m 56s
ios build (monero)	13m 10s
ios build (wownero)	10m 43s
test ts library	54s
comment on pr	4s
create single release file	28s
	3h 2m 21s

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