Update documentation requirements to latest version

[gsheni]

• You can preview the docs here:
• https://readthedocs.com/projects/feature-labs-inc-featuretools/builds/1044856/

[codecov]

Codecov Report

Merging #2225 (3f12770) into main (7f25720) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #2225      +/-   ##
==========================================
- Coverage   99.29%   99.29%   -0.01%     
==========================================
  Files         146      146              
  Lines       17583    17577       -6     
==========================================
- Hits        17459    17453       -6     
  Misses        124      124              

Impacted Files	Coverage Δ
featuretools/utils/gen_utils.py	100.00% <100.00%> (ø)

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[gsheni]

I was originally going to use a .readthedocs.yml file as below. However, this resulted in a significant increase in ru ntime 455 seconds to 594 seconds. Therefore I kept the existing format. It seems strange that readthedocs has the Spark requirements, graphviz, and pandoc installed (without specifying it in .readthedocs.yaml)

# .readthedocs.yaml
# Read the Docs configuration file
# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details

# Required
version: 2

# Set the version of Python and other tools you might need
build:
  os: ubuntu-20.04
  tools:
    python: "3.8"
  apt_packages:
    - pandoc
    - graphviz
    - openjdk-11-jre-headless
  jobs:
    post_create_environment:
      - export PYARROW_IGNORE_TIMEZONE=1
      - export JAVA_HOME="/usr/lib/jvm/java-11-openjdk-amd64"

# Build documentation in the docs/ directory with Sphinx
sphinx:
  configuration: docs/source/conf.py

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

# Optionally set the version of Python and requirements required to build your docs
python:
  install:
    - method: pip
      path: .
      extra_requirements:
        - docs

[gsheni]

• The codecov error can be ignored

[rwedge]

Suggested change

	:user:`gsheni`, :user:`ozzieD`, user:`sbadithe`
	:user:`gsheni`, :user:`ozzieD`, :user:`sbadithe`

[rwedge]

LGTM, left one suggested change