Feature request: Update the docs/requirements.yml to avoid security issues w/ old python versions (used for ReadTheDocs)

[yantosca]

Name and Institution (Required)

Name: Bob Yantosca
Institution: Harvard + GCST

Confirm you have reviewed the following documentation

• Contributing guidelines

New GCClassic feature or discussion

Dependabot found a security issue (https://github.com/geoschem/HEMCO/security/dependabot/1) caused by the version of jinja2 (used to generate ReadTheDocs documentation) having a security vulnerability.

The solution is to update the docs/requirements.txt from:

# Requirements for building the HEMCO documentation
#
# NOTE: Use specific versions for Python packages instead of upper
# bounds.  Using an upper bound will not necessarily install the
# intended version if there already is a version that meets the
# criteria present in the Python environment.
#  -- Bob Yantosca and Lizzie Lundgren (30 Jun 2022)
#
# The following package versions have been proven to work together:
#
sphinx==3.5.4
sphinx_rtd_theme==0.5.2
sphinxcontrib-bibtex==2.2.0
recommonmark
docutils==0.16
jinja2==3.0.3

to

# ======================================================================
# ReadTheDocs requirements file
#
# If you wish to install the dependencies for building the ReadTheDocs
# ReadTheDocs documentation from PyPI (the Python Package Index), use:
#
# $ pip install -r requirements.txt
# ======================================================================
python==3.12
sphinx==7.2.6
sphinx_rtd_theme==2.0.0
sphinxcontrib-bibtex==2.6.2
sphinx-autobuild==2021.3.14
recommonmark==0.7.1
docutils==0.22.1
jinja2==3.1.3

as we have already done for GCPy.

[yantosca]

This update has been made in commit ccd4fce, which is in the docs/dev branch. It can be merged into the GEOS-Chem 14.3.1 / HEMCO 3.8.1 release.