Advanced Micro Devices Inc., the main challenger to Nvidia Corp. in the market for artificial intelligence processors, gave a disappointing forecast for the current period, a sign it’s not making the kind of AI inroads that some investors anticipated.First-quarter sales will be roughly $9.8 billion, plus or minus $300 million, the company said in a statementBloomberg Terminal Tuesday. Analysts had estimated $9.39 billion on average, but some projections topped $10 billion, according to data comp...