workaround build errors with sphinx 7.4.4 (#754)

Author: oliver-sanders

setup.cfg

@@ -51,7 +51,7 @@ install_requires =
     eralchemy==1.2.*
     hieroglyph>=2.1.0
     setuptools>=50
-    sphinx>=7.1
+    sphinx>=7.1, <7.4
     sphinx-design>=0.5.0
     sphinx_rtd_theme>=1.0.0
     sphinxcontrib-svg2pdfconverter