Merge pull request #138 from sandialabs/dependabot/pip/sphinx-lt-9.0.0

chore(deps): Update sphinx requirement from <8.0.0 to <9.0.0

Author: jmgate

doc/requirements.txt

@@ -1,6 +1,6 @@
 # Requirements for building the `staged-script` documentation.
 
-sphinx<8.0.0
+sphinx
 sphinx-autodoc-typehints
 sphinx-copybutton
 sphinx-rtd-theme