Fixed the index.rst to match joint docs requirements

4 jobs for index_fix in 59 minutes and 32 seconds (queued for 15 minutes and 34 seconds)
Status Job ID Name Coverage
  Build
passed #124077
docker
build_linux_27

00:32:58

63.0%
passed #124078
docker
build_linux_36

00:29:00

63.0%
passed #124079
macosx
build_macosx_27

00:26:44

63.0%
passed #124080
macosx
build_macosx_36

00:24:50

63.0%