doc/po/de.po: Fix missing > in </option>.

doc/po/de.po

@@ -2140,7 +2140,7 @@ msgstr "<option>-d</option>"
 #. type: Content of: <refentry><refsect1><variablelist><varlistentry><term>
 #: apt-cdrom.8.xml:95
 msgid "<option>--cdrom</option>"
-msgstr "<option>--cdrom</option"
+msgstr "<option>--cdrom</option>"
 
 #. type: Content of: <refentry><refsect1><variablelist><varlistentry><listitem><para>
 #: apt-cdrom.8.xml:96