requirements: update networkx requirement from <2.9 to <3.1 (#2570)

requirements.txt

@@ -8,7 +8,7 @@ grpcio-tools<1.43.0
 llvmlite<0.40
 matplotlib<3.6.3
 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
+networkx<3.1
 numpy<1.21.7, >=1.17.0
 pillow<9.5.0
 pint<0.21.0