(AZUREVIYA-240) Update log file location in Readme
(AZUREVIYA-240) Update log file location in Readme

Changed /tmp folder to /var/log/sas/install.

Original Commit id: a82f59e67e4ce9767bdace5ae923b420bc2f9d7c
Original Commit repository: git@github.com:sassoftware/quickstart-sas-viya-azure.git
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