Bump conda-incubator/setup-miniconda from 3.0.1 to 3.0.4 (#107)

Bumps [conda-incubator/setup-miniconda](https://github.com/conda-incubator/setup-miniconda) from 3.0.1 to 3.0.4.
- [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@v3.0.1...v3.0.4)

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

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

Author: dependabot[bot]

.github/workflows/ci-tests.yaml

@@ -56,7 +56,7 @@ jobs:
 
       # Install Mambaforge with conda-forge dependencies
       - name: Setup Mambaforge
-        uses: conda-incubator/[email protected].1
+        uses: conda-incubator/[email protected].4
         with:
           activate-environment: sphinx_gmt
           python-version: ${{ matrix.python-version }}