Bump furo from 2023.7.26 to 2023.8.19 in /docs + sphinx to 7.2.3 (#3848)

* Bump furo from 2023.7.26 to 2023.8.19 in /docs

Bumps [furo](https://github.com/pradyunsg/furo) from 2023.7.26 to 2023.8.19.
- [Release notes](https://github.com/pradyunsg/furo/releases)
- [Changelog](https://github.com/pradyunsg/furo/blob/main/docs/changelog.md)
- [Commits](pradyunsg/furo@2023.07.26...2023.08.19)

---
updated-dependencies:
- dependency-name: furo
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

* Move to sphinx 7.2.3 + fix intersphinx_mapping

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Cooper Ry Lees <me@cooperlees.com>

docs/conf.py

@@ -213,4 +213,4 @@ def make_pypi_svg(version: str) -> None:
 # -- Options for intersphinx extension ---------------------------------------
 
 # Example configuration for intersphinx: refer to the Python standard library.
-intersphinx_mapping = {"https://docs.python.org/3/": None}
+intersphinx_mapping = {"<name>": ("https://docs.python.org/3/", None)}

docs/requirements.txt

@@ -1,9 +1,9 @@
 # Used by ReadTheDocs; pinned requirements for stability.
 
 myst-parser==2.0.0
-Sphinx==6.1.3
+Sphinx==7.2.3
 # Older versions break Sphinx even though they're declared to be supported.
 docutils==0.19
 sphinxcontrib-programoutput==0.17
 sphinx_copybutton==0.5.2
-furo==2023.7.26
+furo==2023.8.19