Update VectorSearch.md

demos/guru_scripts/docker/tutorial/4.x/VectorSearch.md

@@ -160,6 +160,7 @@ install query q1
 run query q1([-0.017733968794345856, -0.01019224338233471, -0.016571875661611557])
 ```
 You can also use POST method to call REST api to invoke the installed query. By default, the query will be located at URL "restpp/query/{graphName}/{queryName}". 
+On the payload, you specify the parameter using "key:value" by escaping the quotes of the parameter name.
 ```python
 curl -X POST "http://127.0.0.1:14240/restpp/query/financialGraph/q1" -d "{\"query_vector\":[-0.017733968794345856, -0.01019224338233471, -0.016571875661611557]}" | jq
 ```
@@ -257,6 +258,11 @@ install query q3
 #run the query
 run query q3([-0.017733968794345856, -0.01019224338233471, -0.016571875661611557], 2)
 ```
+You can also use POST method to call REST api to invoke the installed query. By default, the query will be located at URL "restpp/query/{graphName}/{queryName}". 
+On the payload, you specify the parameter using "key:value" by escaping the quotes of the parameter name.
+```python
+curl -X POST "http://127.0.0.1:14240/restpp/query/financialGraph/q3" -d "{\"query_vector\":[-0.017733968794345856, -0.01019224338233471, -0.016571875661611557], \"k\": 2}" | jq
+```
 
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 ## Vector Search on Graph Patterns