fdo#62879 Changed wording of protected section dialog

Clarified the wording of protected section dialog from
"Readonly content cannot be changed." to "Write protected sections cannot be
changed."

Change-Id: Ic6df2d84b6cc9e87727306eff8aa0e06895cab17
Reviewed-on: https://gerrit.libreoffice.org/9905Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

sw/uiconfig/swriter/ui/inforeadonlydialog.ui

@@ -9,7 +9,7 @@
     <property name="type_hint">dialog</property>
     <property name="skip_taskbar_hint">True</property>
     <property name="buttons">ok</property>
-    <property name="text" translatable="yes">Readonly content cannot be changed.</property>
+    <property name="text" translatable="yes">Write protected sections cannot be changed.</property>
     <property name="secondary_text" translatable="yes">No modifications will be accepted.</property>
     <child internal-child="vbox">
       <object class="GtkBox" id="messagedialog-vbox">