updated the readthedocs.yml file to reflect the pytango

# .readthedocs.yml

# Read the Docs configuration file

# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details

# Required

version: 2

# Build documentation in the docs/ directory with Sphinx

sphinx:

  configuration: docs/src/conf.py

# Build documentation with MkDocs

#mkdocs:

#  configuration: mkdocs.yml

# Optionally build your docs in additional formats such as PDF and ePub

# formats: all

# Optionally set the version of Python and requirements required to build your docs

conda:

    file: docs/src/environment.yml