Bump the actions group across 1 directory with 4 updates

Bumps the actions group with 4 updates in the / directory: [scientific-python/action-towncrier-changelog](https://github.com/scientific-python/action-towncrier-changelog), [github/codeql-action](https://github.com/github/codeql-action), [actions/upload-artifact](https://github.com/actions/upload-artifact) and [actions/download-artifact](https://github.com/actions/download-artifact).


Updates `scientific-python/action-towncrier-changelog` from 1 to 2
- [Release notes](https://github.com/scientific-python/action-towncrier-changelog/releases)
- [Changelog](https://github.com/scientific-python/action-towncrier-changelog/blob/main/check_changelog.py)
- [Commits](scientific-python/action-towncrier-changelog@v1...v2)

Updates `github/codeql-action` from 3 to 4
- [Release notes](https://github.com/github/codeql-action/releases)
- [Changelog](https://github.com/github/codeql-action/blob/main/CHANGELOG.md)
- [Commits](github/codeql-action@v3...v4)

Updates `actions/upload-artifact` from 4 to 5
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v4...v5)

Updates `actions/download-artifact` from 5 to 6
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v5...v6)

---
updated-dependencies:
- dependency-name: scientific-python/action-towncrier-changelog
  dependency-version: '2'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
- dependency-name: github/codeql-action
  dependency-version: '4'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
- dependency-name: actions/upload-artifact
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
- dependency-name: actions/download-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/check_changelog.yml

@@ -13,7 +13,7 @@ jobs:
     name: Check towncrier entry in doc/changes/dev/
     runs-on: ubuntu-latest
     steps:
-      - uses: scientific-python/action-towncrier-changelog@v1
+      - uses: scientific-python/action-towncrier-changelog@v2
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           BOT_USERNAME: changelog-bot

.github/workflows/codeql-analysis.yml

@@ -44,7 +44,7 @@ jobs:
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@v3
+      uses: github/codeql-action/init@v4
       with:
         languages: ${{ matrix.language }}
         # If you wish to specify custom queries, you can do so here or in a config file.
@@ -58,7 +58,7 @@ jobs:
     # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
     # If this step fails, then you should remove it and run the build manually (see below)
     - name: Autobuild
-      uses: github/codeql-action/autobuild@v3
+      uses: github/codeql-action/autobuild@v4
 
     # ℹ️ Command-line programs to run using the OS shell.
     # 📚 See https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepsrun
@@ -71,4 +71,4 @@ jobs:
     #   ./location_of_script_within_repo/buildscript.sh
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v3
+      uses: github/codeql-action/analyze@v4

.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@v4
+      - uses: actions/upload-artifact@v5
         with:
           name: dist
           path: dist
@@ -43,7 +43,7 @@ jobs:
       name: pypi
       url: https://pypi.org/p/mne
     steps:
-      - uses: actions/download-artifact@v5
+      - uses: actions/download-artifact@v6
         with:
           name: dist
           path: dist