fix typo in test scripts (#195)

Signed-off-by: chensuyue <suyue.chen@intel.com>

ChatQnA/tests/test_chatqna_on_gaudi.sh

@@ -94,7 +94,7 @@ function validate_microservices() {
     test_embedding=$(python -c "import random; embedding = [random.uniform(-1, 1) for _ in range(768)]; print(embedding)")
     curl http://${ip_address}:7000/v1/retrieval \
         -X POST \
-        -d '{"text":"test","embedding":${your_embedding}}' \
+        -d '{"text":"test","embedding":${test_embedding}}' \
         -H 'Content-Type: application/json' > ${LOG_PATH}/retrieval.log
     exit_code=$?
     if [ $exit_code -ne 0 ]; then