Add handwrittenReceipt to DEFAULT_PROHIBITED_EXPENSES

Address codex review feedback: without this entry, hasConfiguredRules()
would not detect when handwrittenReceipt is the only modified prohibited
expense, since it only compares against DEFAULT_PROHIBITED_EXPENSES keys.

Co-authored-by: Daniel Gale-Rosen <dangrous@users.noreply.github.com>

Author: MelvinBot

src/CONST/index.ts

@@ -3833,6 +3833,7 @@ const CONST = {
             gambling: true,
             tobacco: false,
             adultEntertainment: true,
+            handwrittenReceipt: false,
         },
         DEFAULT_BILLABLE: false,
         DEFAULT_REIMBURSABLE: true,