By KAREN WEISE Tech giants are setting records every few months for how much they are spending on artificial intelligence — but this time, some jitters are also growing. On Thursday, Amazon said its capital expenditures totaled $53 billion in the second quarter, up 69% from a year earlier, as it built AI data centers and other infrastructure. It joined a parade of other big tech companies, with Meta on Wednesday reporting that its costs had risen 55% from last year, while Microsoft said its…
