Bump actions/upload-artifact from 4.1.0 to 4.2.0

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 4.1.0 to 4.2.0.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v4.1.0...v4.2.0)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

.github/workflows/ci.yml

@@ -95,7 +95,7 @@ jobs:
         TOGA_INSTALL_COMMAND="python -m pip install ../$(ls core/dist/toga_core-*.whl)[dev] ../$(ls dummy/dist/toga_dummy-*.whl)" tox -e py
         mv core/.coverage core/.coverage.${{ matrix.platform }}.${{ matrix.python-version }}
     - name: Store coverage data
-      uses: actions/upload-artifact@v4.1.0
+      uses: actions/upload-artifact@v4.2.0
       with:
         name: core-coverage-data-${{ matrix.platform }}-${{ matrix.python-version }}
         path: "core/.coverage.*"
@@ -131,7 +131,7 @@ jobs:
         python -m coverage html --skip-covered --skip-empty
         python -m coverage report --rcfile ../pyproject.toml --fail-under=100
     - name: Upload HTML report if check failed.
-      uses: actions/upload-artifact@v4.1.0
+      uses: actions/upload-artifact@v4.2.0
       if: failure()
       with:
         name: html-coverage-report
@@ -232,7 +232,7 @@ jobs:
       run: ${{ matrix.briefcase-run-prefix }} briefcase run ${{ matrix.backend }} --test ${{ matrix.briefcase-run-args }}
 
     - name: Upload logs
-      uses: actions/upload-artifact@v4.1.0
+      uses: actions/upload-artifact@v4.2.0
       if: failure()
       with:
         name: testbed-failure-logs-${{ matrix.backend }}
@@ -245,7 +245,7 @@ jobs:
         cp -r "${{ matrix.app-user-data-path }}" testbed/app_data/testbed-app_data-${{ matrix.backend }}
 
     - name: Upload app data
-      uses: actions/upload-artifact@v4.1.0
+      uses: actions/upload-artifact@v4.2.0
       if: failure() && matrix.backend != 'android'
       with:
         name: testbed-failure-app-data-${{ matrix.backend }}