chore(deps): update external/libexpat digest to 46cf63a #127

Job	Run time
lib_android (monero)	25m 2s
lib_android (wownero)	24m 36s
lib_darwin (monero)	14m 6s
lib_darwin (wownero)	13m 28s
ios build (monero)	11m 7s
ios build (wownero)	11m 53s
lib_linux (monero)	27m 45s
lib_linux (wownero)	28m 47s
macos build (monero)	3m 17s
macos build (wownero)	3m 11s
lib_mingw (monero)	3m 18s
lib_mingw (wownero)	3m 6s
lib_sailfishos_aarch64 (monero)	28m 29s
lib_sailfishos_aarch64 (wownero)	24m 58s
lib_sailfishos_i486 (monero)	2m 29s
lib_sailfishos_i486 (wownero)	2m 26s
wallet_cake_android	22m 41s
test ts library	1m 3s
create single release file	49s
comment on pr	4s
	4h 12m 35s

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