improve doc about the two build versions required for the smoketest

test/smoke/README.md

@@ -14,7 +14,7 @@ cd ../..
 yarn smoketest
 
 # Build
-yarn smoketest --build PATH_TO_BUILD --stable-build PATH_TO_STABLE_BUILD
+yarn smoketest --build PATH_TO_NEW_BUILD_PARENT_FOLDER --stable-build PATH_TO_LAST_STABLE_BUILD_PARENT_FOLDER
 ```
 
 ### Run for a release
@@ -24,7 +24,14 @@ You must always run the smoketest version which matches the release you are test
 ```bash
 git checkout release/1.22
 yarn
-yarn smoketest --build PATH_TO_RELEASE_BUILD --stable-build PATH_TO_STABLE_BUILD
+```
+
+In addition to the new build to be released you will need the previous stable build so that the smoketest can test the data migration. 
+The recommended way to make these builds available for the smoketest is by downloading their archive version (\*.zip) and extracting 
+them into two folders. Pass the folder paths to the smoketest as follows:
+
+```bash
+yarn smoketest --build PATH_TO_NEW_RELEASE_PARENT_FOLDER --stable-build PATH_TO_LAST_STABLE_RELEASE_PARENT_FOLDER
 ```
 
 ### Debug