Fixed the index.rst to match joint docs requirements

10 jobs for index_fix in 74 minutes and 43 seconds (queued for 3 minutes and 22 seconds)
Status Job ID Name Coverage
  Build
passed #124249
docker
build_linux_27

00:32:05

62.0%
passed #124250
docker
build_linux_36

00:18:21

62.0%
passed #124054
macosx
build_macosx_27

00:35:42

62.0%
passed #124055
macosx
build_macosx_36

00:32:25

62.0%
failed #124156
docker
build_linux_27

00:40:44

62.0%
failed #124067
docker
build_linux_27

00:37:04

62.0%
failed #124052
docker
build_linux_27

00:37:19

62.0%
failed #124157
docker
build_linux_36

00:45:29

62.0%
failed #124068
docker
build_linux_36

00:59:07

62.0%
failed #124053
docker
build_linux_36

00:34:16

62.0%