Chore(deps): Update sphinx requirement from <7.5 to <8.1

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/v8.0.2/CHANGES.rst)
- [Commits](sphinx-doc/sphinx@v0.1.61611...v8.0.2)

---
updated-dependencies:
- dependency-name: sphinx
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

pyproject.toml

@@ -83,7 +83,7 @@ dependencies = [
   "pyyaml<7",
   "requests<3",
   "rich-click<2",
-  "sphinx<7.5",
+  "sphinx<8.1",
   "sphobjinv<2.4",
   "tabulate<0.10",
   "verlib2==0.2.0",
@@ -99,7 +99,7 @@ develop = [
 ]
 docs = [
   "furo==2024.5.6",
-  "sphinx<7.5",
+  "sphinx<8.1",
   "sphinx-autobuild==2024.2.4",
   "sphinx-copybutton<0.6",
   "sphinx-design-elements<0.5",