chore(ci): bump the github-actions group with 2 updates

Bumps the github-actions group with 2 updates: [actions/upload-artifact](https://github.com/actions/upload-artifact) and [actions/download-artifact](https://github.com/actions/download-artifact).


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: actions/upload-artifact
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
- dependency-name: actions/download-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/test.arduino-compile-examples.yml

@@ -105,7 +105,7 @@ jobs:
           VALID_NAME=$(echo "${{ matrix.board.fqbn }}" | sed 's/:/-/g')
           echo "UPLOAD_NAME=$VALID_NAME" >> "$GITHUB_ENV"
       - name: Upload sketches report to workflow artifact.
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: ${{ env.SKETCHES_REPORTS_ARTIFACT_PREFIX }}${{ env.UPLOAD_NAME }}
           path: ${{ env.SKETCHES_REPORTS_PATH }}
@@ -118,7 +118,7 @@ jobs:
     steps:
       # This step is needed to get the size data produced by the compile jobs.
       - name: Download sketches reports artifact.
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           path: ${{ env.SKETCHES_REPORTS_PATH }}