Merge pull request #191 from hed-standard/dependabot/pip/develop/sphi…

…nx-gte-4-and-lt-8

Update sphinx requirement from <5,>=4 to >=4,<8

docs/requirements.txt

@@ -21,7 +21,7 @@ python-dateutil>=2.8.2
 pytz>=2022.1
 semantic_version>=2.9.0
 six==1.16.0
-Sphinx>=4,<5
+Sphinx>=4,<8
 SphinxExtensions>=0.2.0
 sphinx_rtd_theme>=1.0.0
 Werkzeug>=2.1.2