examples/training: Fix file name in README (#13803)

This patch fixes binary file names in README.md.

Signed-off-by: Masanari Iida <standby24x7@gmail.com>

examples/training/README.md

@@ -10,8 +10,8 @@ Proof of concept:
 
 ``` sh
 export model_name=llama_3.2-1b && export quantization=f32
-./build/bin/finetune --file wikitext-2-raw/wiki.test.raw -ngl 999 --model models/${model_name}-${quantization}.gguf -c 512 -b 512 -ub 512
-./build/bin/perplexity --file wikitext-2-raw/wiki.test.raw -ngl 999 --model finetuned-model.gguf
+./build/bin/llama-finetune --file wikitext-2-raw/wiki.test.raw -ngl 999 --model models/${model_name}-${quantization}.gguf -c 512 -b 512 -ub 512
+./build/bin/llama-perplexity --file wikitext-2-raw/wiki.test.raw -ngl 999 --model finetuned-model.gguf
 ```
 
 The perplexity value of the finetuned model should be lower after training on the test set for 2 epochs.