Bump mpi4py/setup-mpi from 1.4.2 to 1.4.3 (#4235)

Bumps [mpi4py/setup-mpi](https://github.com/mpi4py/setup-mpi) from 1.4.2 to 1.4.3.
- [Release notes](https://github.com/mpi4py/setup-mpi/releases)
- [Commits](mpi4py/setup-mpi@v1.4.2...v1.4.3)

---
updated-dependencies:
- dependency-name: mpi4py/setup-mpi
  dependency-version: 1.4.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]

.github/workflows/windows.yml

@@ -118,7 +118,7 @@ jobs:
           (Get-Content __init__.py).Replace('# WINDOWSDLL', 'import os; os.add_dll_directory("D:/a/dolfinx/dolfinx-install/bin"); os.add_dll_directory("C:/Program Files (x86)/Intel/oneAPI/mpi/latest/opt/mpi/libfabric/bin")') | Set-Content __init__.py
           Get-Content __init__.py
 
-      - uses: mpi4py/setup-mpi@v1.4.2
+      - uses: mpi4py/setup-mpi@v1.4.3
         with:
           mpi: "intelmpi"