Update previously missed json edit

[AdityaB4]

@AY2324S2-CS2103T-W12-2/developers

Update your root level preferences.json to:

{
  "guiSettings" : {
    "windowWidth" : 740.0,
    "windowHeight" : 688.0,
    "windowCoordinates" : {
      "x" : 446,
      "y" : 127
    }
  },
  "addressBookFilePath" : "data/modcontacts.json"
}

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 64.35%. Comparing base (bd2418a) to head (9d6eb60).
Report is 6 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #146   +/-   ##
=========================================
  Coverage     64.35%   64.35%           
  Complexity      508      508           
=========================================
  Files            98       98           
  Lines          2003     2003           
  Branches        208      208           
=========================================
  Hits           1289     1289           
  Misses          630      630           
  Partials         84       84           

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[yadunut]

LGTM