chore(deps): update external/libexpat digest to 624da0f #102

Job	Run time
lib_android (monero)	25m 36s
lib_android (wownero)	24m 22s
lib_darwin (monero)	13m 37s
lib_darwin (wownero)	13m 41s
ios build (monero)	12m 53s
ios build (wownero)	13m 0s
lib_linux (monero)	3m 4s
lib_linux (wownero)	2m 29s
macos build (monero)	4m 33s
lib_mingw (monero)	3m 32s
lib_sailfishos_aarch64 (monero)	3m 38s
macos build (wownero)	5m 6s
lib_mingw (wownero)	3m 9s
lib_sailfishos_aarch64 (wownero)	3m 7s
lib_sailfishos_i486 (monero)	2m 24s
lib_sailfishos_i486 (wownero)	2m 3s
wallet_cake_android	17m 59s
wallet_xmruw_android (monero)	7m 10s
wallet_xmruw_android (wownero)	6m 59s
comment on pr	0s
	2h 48m 22s

Provide feedback