Update environment-mpich.yml

Author: jan-janssen

.ci_support/environment-mpich.yml

@@ -4,7 +4,7 @@ dependencies:
 - coverage
 - lammps =2024.08.29=*_mpi_mpich_*
 - mpich =4.3.2
-- numpy =2.3.3
+- numpy =2.3.4
 - mpi4py =4.1.1
 - executorlib =1.7.2
 - ase =3.26.0