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

Job	Run time
amd64 / build-stellar-core	40s
amd64 / build-stellar-soroban-rpc	1m 35s
amd64 / build-stellar-friendbot	53s
amd64 / build-stellar-horizon	3m 29s
arm64 / build-stellar-core	41s
arm64 / build-stellar-horizon	11m 42s
arm64 / build-stellar-friendbot	2m 51s
arm64 / build-stellar-soroban-rpc	1m 20s
amd64 / build	3m 39s
amd64 / test (testnet)	2m 32s
amd64 / push-pr	49s
amd64 / test (pubnet)	1m 35s
amd64 / test (standalone)	1m 43s
amd64 / test (standalone, --enable-horizon-captive-core)	1m 47s
amd64 / push-release	0s
arm64 / build	6m 42s
arm64 / test (testnet)	13m 42s
arm64 / test (pubnet)	1m 20s
arm64 / test (standalone)	1m 54s
arm64 / push-pr	55s
arm64 / test (standalone, --enable-horizon-captive-core)	2m 52s
arm64 / push-release	0s
manifest / push	4s
complete	1s
	1h 2m 46s

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