updated core ref on build-soroban-dev target #379

Job	Run time
amd64 / build-stellar-friendbot	1m 2s
amd64 / build-stellar-core	31s
amd64 / build-stellar-soroban-rpc	1m 33s
amd64 / build-stellar-horizon	3m 24s
arm64 / build-stellar-core	28s
arm64 / build-stellar-friendbot	2m 54s
arm64 / build-stellar-horizon	10m 5s
arm64 / build-stellar-soroban-rpc	49s
amd64 / build	3m 47s
amd64 / test (testnet)	2m 23s
amd64 / test (pubnet)	1m 28s
amd64 / push-pr	52s
amd64 / test (standalone)	1m 45s
amd64 / test (standalone, --enable-horizon-captive-core)	1m 49s
amd64 / push-release	0s
arm64 / build	8m 48s
arm64 / test (testnet)	21m 20s
arm64 / push-pr	43s
arm64 / test (pubnet)	1m 34s
arm64 / test (standalone)	2m 11s
arm64 / test (standalone, --enable-horizon-captive-core)	2m 24s
arm64 / push-release	0s
manifest / push	10s
complete	1s
	1h 10m 1s

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