[dependabot] Chore: Update sphinx requirement from <8,>=6 to >=6,<9 (#…

…516)

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@v6.0.0...v8.0.2)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Modeseven Industrial Solutions <[email protected]>

docs/requirements.txt

@@ -1,4 +1,4 @@
-sphinx<8,>=6
+sphinx>=6,<9
 sphinx-autoapi==3.2.1
 sphinx-autodoc-typehints
 sphinx-rtd-theme==2.0.0