Update networkx requirement from <=3.3 to <=3.4.2 in /tests

Updates the requirements on [networkx](https://github.com/networkx/networkx) to permit the latest version.
- [Release notes](https://github.com/networkx/networkx/releases)
- [Commits](networkx/networkx@networkx-0.23...networkx-3.4.2)

---
updated-dependencies:
- dependency-name: networkx
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

tests/constraints.txt

@@ -24,7 +24,7 @@ pytest-timeout==2.3.1
 jax<=0.4.35
 jaxlib<=0.4.35
 kornia==0.7.0
-networkx<=3.3
+networkx<=3.4.2
 flax<=0.10.0
 
 --extra-index-url https://download.pytorch.org/whl/cpu