For LDEV-5700, updated the cfpdf attributes in action.md to include action="extractBookmarks".

Author: cfmitrah

docs/03.reference/02.tags/pdf/_attributes/action.md

@@ -2,6 +2,7 @@
 - addFooter
 - addWatermark
 - deletePages
+- extractBookmarks
 - extractText
 - getInfo
 - merge
@@ -14,4 +15,6 @@
 - thumbnail 
 - write
 
-**Note:**  action "thumbnail" was implemented from PDF Extension version - 1.1.0.8
+**Note:**  
+- The `thumbnail` action was implemented in PDF Extension version 1.1.0.8.  
+- The `extractBookmarks` action was implemented in PDF Extension version 1.2.0.11-SNAPSHOT.