chore: bump conda-incubator/setup-miniconda in the actions group (#51)

Bumps the actions group with 1 update: [conda-incubator/setup-miniconda](https://github.com/conda-incubator/setup-miniconda).


Updates `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
  dependency-group: actions
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/R-CMD-check.yaml

@@ -40,7 +40,7 @@ jobs:
 
       - name: Setup Miniconda
         if: matrix.backend == 'conda'
-        uses: conda-incubator/setup-miniconda@v3
+        uses: conda-incubator/setup-miniconda@v4
         with:
           python-version: ${{ matrix.python }}
           auto-activate-base: false