llama.cpp

1ebbaddf - perplexity : update comments/error msg to use decode [no ci] (#15227)

perplexity : update comments/error msg to use decode [no ci] (#15227) This commit updates comments and error messages to use "decode" instead of "eval" in perplexity.cpp. The motivation for this is that `llama_eval` was renamed to `llama_decode` a while ago, but the comments and error messages still referred to "eval". This change ensures consistency and clarity.