build: update sphinx requirement from >=5.3.0,<7.4 to >=7.0,<8.3 (#1017)

* build: update sphinx requirement from >=5.3.0,<7.4 to >=7.0,<8.3

Updates the requirements on [sphinx](https://github.com/sphinx-doc/sphinx) to permit the latest version.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/master/CHANGES.rst)
- [Commits](sphinx-doc/sphinx@v5.3.0...v8.2.3)

---------

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Daniel G. Krakowczyk <[email protected]>

Author: dependabot[bot]

pyproject.toml

@@ -55,7 +55,7 @@ docs = [
   "pybtex",
   "pydata-sphinx-theme>=0.12",
   "setuptools>=61.0.0",
-  "sphinx>=5.3.0,<7.4",
+  "sphinx>=7.0,<8.3",
   "sphinx-copybutton>=0.4.0",
   "sphinx-favicon>=1.0.1",
   "sphinx_design>=0.3.0",