fix typo in index page

git-svn-id: https://svn.osgeo.org/gdal/trunk/gdal@27871 f0d54148-0727-0410-94bb-9a71ac55c965
Stop probing for csv/horiz_cs.csv. (#5698)

git-svn-id: https://svn.osgeo.org/gdal/trunk/gdal@27872 f0d54148-0727-0410-94bb-9a71ac55c965