Update script

[barbaravaldez]

• Add -TrustServerCertificate to fix the following error:

  Line |
  115 |  … rverName = (Invoke-SqlCmd -ServerInstance $serverInstance -Credential …
   |                ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   | A connection was successfully established with the server, but then an
   | error occurred during the pre-login handshake. (provider: TCP Provider,
   | error: 35 - An internal exception was caught)
  Invoke-Sqlcmd: /opt/mssql/bin/runassessment.ps1:115
  Line |
  115 |  … rverName = (Invoke-SqlCmd -ServerInstance $serverInstance -Credential …
   |                ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   | Incorrect syntax was encountered while parsing ''.

• Make password readonly

  Get-SqlInstance: /opt/mssql/bin/runassessment.ps1:123
  Line |
  123 |      Get-SqlInstance -ServerInstance $serverInstance -Credential $cred …
   |      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   | password must be marked as read only.