[FAB-7487] Fix typo in node/fabcar.js
[FAB-7487] Fix typo in node/fabcar.js

According to this tutorial http://hyperledger-fabric.readthedocs.io/en/latest/write_first_app.html
the function name is spelled changeCarOwner.

Renamed changeCarowner to changeCarOwner.

Change-Id: Ic32c76137e3686cbf951f846da0ef8c4c5d8986d
Signed-off-by: Nikita Klein <c66f428dbd56d57a6f28ccdaec56f59777962bc7@gmail.com>

huangeason26/fabric-samples,huangeason26/fabric-samples,huangeason26/fabric-samples,huangeason26/fabric-samples