Update sphinx requirement from ~=5.3.0 to >=5.3,<7.3 in /package (#1605)

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...v7.2.6)

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

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

package/setup.py

@@ -52,7 +52,7 @@
     },
     extras_require={
         "docs": [
-            "sphinx~=5.3.0",
+            "sphinx>=5.3,<7.3",
             "sphinx_copybutton==0.3.1",
             "sphinx-notfound-page",
             "sphinx_rtd_theme==1.2.0",