Pinning Sphinx<7.3.7

See sphinx-doc/sphinx#12339

setup.cfg

@@ -55,7 +55,7 @@ dev =
 	matplotlib>=3.1.1
 	flake8>=3.7.9
 	doc8>=0.8.0
-	pytest>=5.2.2,<8.0.0
+	pytest>=5.2.2
 	pytest-cov>=2.8.1
 	pytest-mock>=1.13.0
 	pytest-sugar>=0.9.2
@@ -72,7 +72,7 @@ dev =
 	wheel>=0.33.6
 
 docs =
-	Sphinx>=7.1.0,<8.0.0
+	Sphinx>=7.0.0,<7.3.7 # Pinning until this solved issue is tagged: https://github.com/sphinx-doc/sphinx/issues/12339
 	sphinx_bootstrap_theme>=0.4.12
 	recommonmark>=0.6
 	sphinx-issues>=1.2.0