requirements: update pillow requirement from <9.3.0 to <9.4.0 (#2515)

requirements.txt

@@ -10,7 +10,7 @@ matplotlib<3.6.2
 modeci_mdf<0.5, >=0.3.4; (platform_machine == 'AMD64' or platform_machine == 'x86_64') and platform_python_implementation == 'CPython' and implementation_name == 'cpython'
 networkx<2.9
 numpy<1.21.7, >=1.17.0
-pillow<9.3.0
+pillow<9.4.0
 pint<0.21.0
 toposort<1.8
 torch>=1.8.0, <1.13.0; (platform_machine == 'AMD64' or platform_machine == 'x86_64') and platform_python_implementation == 'CPython' and implementation_name == 'cpython'