Bump conda-incubator/setup-miniconda from 2.1.1 to 3.0.4 (dmlc#10278)

Bumps [conda-incubator/setup-miniconda](https://github.com/conda-incubator/setup-miniconda) from 2.1.1 to 3.0.4.
- [Release notes](https://github.com/conda-incubator/setup-miniconda/releases)
- [Commits](conda-incubator/setup-miniconda@v2.1.1...v3.0.4)

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

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

Author: dependabot[bot]

.github/workflows/python_tests.yml

@@ -91,7 +91,7 @@ jobs:
       if: matrix.os == 'macos-11'
       run: |
         brew install ninja libomp
-    - uses: conda-incubator/setup-miniconda@35d1405e78aa3f784fe3ce9a2eb378d5eeb62169 # v2.1.1
+    - uses: conda-incubator/setup-miniconda@a4260408e20b96e80095f42ff7f1a15b27dd94ca # v3.0.4
       with:
         auto-update-conda: true
         python-version: ${{ matrix.python-version }}
@@ -178,7 +178,7 @@ jobs:
       with:
         submodules: 'true'
 
-    - uses: conda-incubator/setup-miniconda@35d1405e78aa3f784fe3ce9a2eb378d5eeb62169 # v2.1.1
+    - uses: conda-incubator/setup-miniconda@a4260408e20b96e80095f42ff7f1a15b27dd94ca # v3.0.4
       with:
         auto-update-conda: true
         python-version: ${{ matrix.config.python-version }}