gui: rename duplicate label in createwalletdialog.ui

Author: Sjors

src/qt/forms/createwalletdialog.ui

@@ -74,7 +74,7 @@
     <bool>false</bool>
    </property>
   </widget>
-  <widget class="QLabel" name="label">
+  <widget class="QLabel" name="encrypt_wallet_label">
    <property name="geometry">
     <rect>
      <x>20</x>