[test only] update PT pin to 0723 #2038

Job	Run time
build-llm-demo (bpe) / linux-job	44m 37s
build-llm-demo (tiktoken) / linux-job	47m 22s
upload-artifacts	1m 31s
test-llama-app (bpe) / mobile-job (android)	2m 3s
	1h 35m 33s

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