chore(deps): update external/libzmq digest to 5f408ba #14

Job	Run time
lib_android (monero)	3m 15s
lib_darwin (monero)	43s
ios build (monero)	10s
lib_android (wownero)	3m 31s
ios build (wownero)	10s
lib_darwin (wownero)	40s
lib_linux (monero)	44s
macos build (monero)	8s
lib_linux (wownero)	39s
lib_mingw (monero)	50s
lib_sailfishos_aarch64 (monero)	18s
lib_mingw (wownero)	54s
macos build (wownero)	8s
lib_sailfishos_aarch64 (wownero)	12s
lib_sailfishos_i486 (monero)	7s
lib_sailfishos_i486 (wownero)	3s
wallet_xmruw_android	0s
wallet_cake_android	0s
comment on pr	0s
	12m 32s

Provide feedback