update IDs in reference PDF

Author: davidcarlisle

tagging-status/testfiles-compatible/forest-ext/forest-ext-01.luatex.struct.xml

@@ -4,17 +4,17 @@
      id="ID.02"
     >
    <text-unit xmlns="https://www.latex-project.org/ns/dflt"
-      id="ID.05"
+      id="ID.06"
       rolemaps-to="Part"
      >
     <text xmlns="https://www.latex-project.org/ns/dflt"
-       id="ID.06"
+       id="ID.07"
        xmlns:Layout="http://iso.org/pdf/ssn/Layout"
        Layout:TextAlign="Justify"
        rolemaps-to="P"
       >
      <Figure xmlns="http://iso.org/pdf2/ssn"
-        id="ID.07"
+        id="ID.08"
         alt="VP 2 children :  DP:  child John;  V prime V:  child sent;  DP:  child Mary;  DP 2 children :  D:  child a;  NP:  child letter;  "
         xmlns:Layout="http://iso.org/pdf/ssn/Layout"
         Layout:BBox="{ 133.76837, 667.19801, 281.64244, 808.52953 }"