org-manual: Fix reference to binding of org-info-find-node

Reported by Ian Garmaise <ian.g@phorixsol.com>
Archived-At: <http://permalink.gmane.org/gmane.emacs.orgmode/123498>

doc/org-manual.org

@@ -19005,8 +19005,8 @@ further based on their usage needs.  For example, the normal
 #+cindex: Info
 
 #+findex: org-info-find-node
-#+kindex: C-c C-x C-i
-{{{kbd(C-c C-x C-i)}}} in an Org file tries to open a suitable section
+#+kindex: C-c C-x I
+{{{kbd(C-c C-x I)}}} in an Org file tries to open a suitable section
 of the Org manual depending on the syntax at point.  For example,
 using it on a headline displays "Document Structure" section.