pin petsc4py to <= 3.23.4 due to failing test on python 3.11 (#640)

Author: gauravmanmode

.tools/envs/testenv-linux.yml

@@ -4,7 +4,7 @@ channels:
   - conda-forge
   - nodefaults
 dependencies:
-  - petsc4py
+  - petsc4py<=3.23.4
   - jax
   - cyipopt>=1.4.0  # dev, tests
   - pygmo>=2.19.0  # dev, tests, docs

.tools/update_envs.py

@@ -29,7 +29,8 @@ def main() -> None:
     ## linux
     test_env_linux = deepcopy(test_env)
     test_env_linux.insert(_insert_idx, "  - jax")
-    test_env_linux.insert(_insert_idx, "  - petsc4py")
+    # pinned petsc4py due to failing test on python 3.11 , revert later
+    test_env_linux.insert(_insert_idx, "  - petsc4py<=3.23.4")
 
     ## test environment others
     test_env_others = deepcopy(test_env)