[dependabot]: Bump the actions group with 3 updates (mne-tools#13557)

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: mne[bot] <50266005+mne-bot@users.noreply.github.com>
Co-authored-by: Eric Larson <larson.eric.d@gmail.com>

Author: 3 people

.github/workflows/release.yml

@@ -28,7 +28,7 @@ jobs:
           pip install build twine
       - run: python -m build --sdist --wheel
       - run: twine check --strict dist/*
-      - uses: actions/upload-artifact@v5
+      - uses: actions/upload-artifact@v6
         with:
           name: dist
           path: dist
@@ -43,7 +43,7 @@ jobs:
       name: pypi
       url: https://pypi.org/p/mne
     steps:
-      - uses: actions/download-artifact@v6
+      - uses: actions/download-artifact@v7
         with:
           name: dist
           path: dist

.github/workflows/tests.yml

@@ -165,7 +165,7 @@ jobs:
         run: MNE_SKIP_TESTING_DATASET_TESTS=true pytest -m "not (ultraslowtest or pgtest)" --tb=short --cov=mne --cov-report xml -vv -rfE mne/
         if: matrix.kind == 'minimal'
       - run: ./tools/get_testing_version.sh
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         with:
           key: ${{ env.TESTING_VERSION }}
           path: ~/mne_data