doc/extindex: fix braino/typo

I have no idea how I made up the word `extentry' :x

diff --git a/Documentation/public-inbox-extindex.pod b/Documentation/public-inbox-extindex.pod
index 2755064bd57a486297f9f8fef0e8588640c1a98d..131cc705b6044a40c05d57323853ce9d862b4ffb 100644 (file)
--- a/Documentation/public-inbox-extindex.pod
+++ b/Documentation/public-inbox-extindex.pod
@@ -126,7 +126,7 @@ C<--all> is as follows:
                coderepo = bar
 
 Putting an C<extindex> entry in the config allows L<PublicInbox::WWW>.
-You can have any number of C<extentry.$NAME> sections where C<$NAME>
+You can have any number of C<extindex.$NAME> sections where C<$NAME>
 is something other than C<all> to display a union of several inboxes.
 
 It is strongly recommended any public inboxes indexed by this command