Updated the example blade (SpartnerNL#154)

Example blade didn't match the InvoicesExport view example

Author: lukesUbuntu

3.1/exports/from-view.md

@@ -24,7 +24,7 @@ class InvoicesExport implements FromView
 }
 ```
 
-It will convert an HTML table into an Excel spreadsheet. For example; `users.blade.php`:
+It will convert an HTML table into an Excel spreadsheet. For example; `invoices.blade.php`:
 
 ```html
 <table>
@@ -35,10 +35,10 @@ It will convert an HTML table into an Excel spreadsheet. For example; `users.bla
     </tr>
     </thead>
     <tbody>
-    @foreach($users as $user)
+    @foreach($invoices as $invoice)
         <tr>
-            <td>{{ $user->name }}</td>
-            <td>{{ $user->email }}</td>
+            <td>{{ $invoice->name }}</td>
+            <td>{{ $invoice->email }}</td>
         </tr>
     @endforeach
     </tbody>