Sui mainnet upgraded to version V1.26.2, Sui protocol upgraded to version 48

The Sui mainnet has now been upgraded to version V1.26.2, and the Sui protocol has been upgraded to version 48. Other upgrade highlights include: Sui's native randomness function is now enabled on the testnet, the indexer cache is correctly set, the indexer reader will work properly and return the correct data, and the timeout value for executing transaction blocks has been increased.