Update dependency Sphinx to v5.2.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
Sphinx (changelog)	==5.1.1 -> ==5.2.0

---

Release Notes

sphinx-doc/sphinx

v5.2.0

==============================

Dependencies

• #​10356: Sphinx now uses declarative metadata with pyproject.toml to
  create packages, using PyPA's build project as a build backend. Patch by
  Adam Turner.

Incompatible changes

Deprecated

• #​10843: Support for HTML 4 output. Patch by Adam Turner.

Features added

• #​10286: C++, support requires clauses not just between the template
  parameter lists and the declaration.
• #​10755: linkcheck: Check the source URL of raw directives that use the url
  option.
• #​10781: Allow :rst:role:ref role to be used with definitions and fields.
• #​10717: HTML Search: Increase priority for full title and
  subtitle matches in search results
• #​10718: HTML Search: Save search result score to the HTML element for debugging
• #​10673: Make toctree accept 'genindex', 'modindex' and 'search' docnames
• #​6316, #​10804: Add domain objects to the table of contents. Patch by Adam Turner
• #​6692: HTML Search: Include explicit :rst:dir:index directive index entries
  in the search index and search results. Patch by Adam Turner
• #​10816: imgmath: Allow embedding images in HTML as base64
• #​10854: HTML Search: Use browser localstorage for highlight control, stop
  storing highlight parameters in URL query strings. Patch by Adam Turner.

Bugs fixed

• #​10257: C++, ensure consistent non-specialization template argument
  representation.
• #​10729: C++, fix parsing of certain non-type template parameter packs.
• #​10715: Revert #​10520: "Fix" use of sidebar classes in agogo.css_t

Testing

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, click this checkbox.

---

This PR has been generated by Mend Renovate. View repository job log here.

[coveralls]

Coverage remained the same at 88.669% when pulling 8080b5b on renovate/sphinx-5.x into dbd4a82 on develop.