org.texi: more small typos.

doc/org.texi

@@ -10982,10 +10982,10 @@ Org-mode can generate an index across the files of a publishing project.
 publish it as @file{theindex.html}.
 @end multitable
 
-The file will be create when first publishing a project with the
+The file will be created when first publishing a project with the
 @code{:makeindex} set.  The file only contains a statement @code{#+include:
 "theindex.inc"}.  You can then build around this include statement by adding
-a title, style information etc.
+a title, style information, etc.
 
 @node Uploading files, Sample configuration, Configuration, Publishing
 @section Uploading files