org.el: Add "#+MATHJAX" and "#+INFOJS_OPT" to the list of keywords for completion

* org.el (org-options-keywords): Add "#+MATHJAX" and
"#+INFOJS_OPT" to the list of keywords for completion.

lisp/org.el

@@ -11316,9 +11316,9 @@ This function can be used in a hook."
     "DESCRIPTION:" "KEYWORDS:" "LANGUAGE:" "OPTIONS:"
     "EXPORT_SELECT_TAGS:" "EXPORT_EXCLUDE_TAGS:"
     "LINK_UP:" "LINK_HOME:" "LINK:" "TODO:"
-    "XSLT:" "CATEGORY:" "SEQ_TODO:" "TYP_TODO:"
+    "XSLT:" "MATHJAX:" "CATEGORY:" "SEQ_TODO:" "TYP_TODO:"
     "PRIORITIES:" "DRAWERS:" "STARTUP:" "TAGS:"
-    "FILETAGS:" "ARCHIVE:"))
+    "FILETAGS:" "ARCHIVE:" "INFOJS_OPT:"))
 
 (defconst org-additional-option-like-keywords-for-flyspell
   (delete-dups