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

Job	Run time
amd64 / build-stellar-core	22m 44s
amd64 / build-stellar-friendbot	1m 5s
amd64 / build-stellar-horizon	2m 58s
amd64 / build-stellar-soroban-rpc	2m 1s
arm64 / build-stellar-core	1h 14m 19s
arm64 / build-stellar-friendbot	6m 45s
arm64 / build-stellar-horizon	16m 21s
arm64 / build-stellar-soroban-rpc	1m 54s
amd64 / build	4m 23s
amd64 / test (standalone)	1m 49s
amd64 / test (standalone, --enable-horizon-captive-core)	1m 42s
amd64 / push-pr	58s
amd64 / test (standalone, --enable-soroban-rpc)	1m 57s
amd64 / push-release	0s
arm64 / build	7m 54s
arm64 / test (standalone)	1m 52s
arm64 / test (standalone, --enable-horizon-captive-core)	2m 27s
arm64 / push-pr	52s
arm64 / test (standalone, --enable-soroban-rpc)	2m 1s
arm64 / push-release	0s
manifest / push	5s
complete	1s
	2h 34m 8s

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