Added es version of bertology.mdx doc (#17255)
* added bertology es doc
* toctree fix
* Update docs/source/es/bertology.mdx
Co-authored-by: Omar U. Espejel <espejelomar@gmail.com>
* Update docs/source/es/bertology.mdx
Co-authored-by: Omar U. Espejel <espejelomar@gmail.com>
* Update docs/source/es/bertology.mdx
Co-authored-by: Omar U. Espejel <espejelomar@gmail.com>
* change position of bertology in _toctree.yml
Co-authored-by: Omar U. Espejel <espejelomar@gmail.com>