Fix field names for annotation_directory_item in documentation (dex-format.html)

The names of the annotated_methods_off and annotated_parameters_off fields aren't
consistent with their purpose. _size is consistent with how "count of" type fields
are named elsewhere in the file
diff --git a/docs/dex-format.html b/docs/dex-format.html
index 88a7fb0..bc69dd0 100644
--- a/docs/dex-format.html
+++ b/docs/dex-format.html
@@ -2499,12 +2499,12 @@
   <td>count of fields annotated by this item</td>
 </tr>
 <tr>
-  <td>annotated_methods_off</td>
+  <td>annotated_methods_size</td>
   <td>uint</td>
   <td>count of methods annotated by this item</td>
 </tr>
 <tr>
-  <td>annotated_parameters_off</td>
+  <td>annotated_parameters_size</td>
   <td>uint</td>
   <td>count of method parameter lists annotated by this item</td>
 </tr>