chore(deps): update external/libexpat digest to 624da0f #95

Job	Run time
lib_darwin (monero)	14m 5s
lib_android (monero)	25m 23s
ios build (monero)	10m 10s
lib_darwin (wownero)	13m 44s
lib_android (wownero)	24m 41s
ios build (wownero)	10m 32s
lib_linux (monero)	3m 1s
macos build (monero)	4m 14s
lib_mingw (monero)	3m 31s
lib_linux (wownero)	2m 29s
macos build (wownero)	3m 14s
lib_mingw (wownero)	3m 30s
lib_sailfishos_aarch64 (monero)	3m 31s
lib_sailfishos_i486 (monero)	2m 34s
lib_sailfishos_aarch64 (wownero)	4m 15s
lib_sailfishos_i486 (wownero)	2m 28s
wallet_cake_android	19m 48s
wallet_xmruw_android (monero)	6m 56s
wallet_xmruw_android (wownero)	6m 56s
comment on pr	3s
	2h 45m 5s

Provide feedback