Bump conda-incubator/setup-miniconda from 3 to 4 (#3168)

Bumps [conda-incubator/setup-miniconda](https://github.com/conda-incubator/setup-miniconda) from 3 to 4.
- [Release notes](https://github.com/conda-incubator/setup-miniconda/releases)
- [Changelog](https://github.com/conda-incubator/setup-miniconda/blob/main/CHANGELOG.md)
- [Commits](conda-incubator/setup-miniconda@v3...v4)

---
updated-dependencies:
- dependency-name: conda-incubator/setup-miniconda
  dependency-version: '4'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Fabian Fröhlich <fabian.frohlich@crick.ac.uk>
Co-authored-by: Daniel Weindl <dweindl@users.noreply.github.com>

Author: 3 people

.github/workflows/test_conda_install.yml

@@ -19,7 +19,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
       - name: Set up Miniconda
-        uses: conda-incubator/setup-miniconda@v3
+        uses: conda-incubator/setup-miniconda@v4
         with:
           python-version: ${{ matrix.python-version }}
           auto-update-conda: true