Update actions/upload-artifact action to v4.6.0

Author: renovate[bot]

.github/workflows/flutter.yml

@@ -35,7 +35,7 @@ jobs:
           chromedriver --port=4444 &
           echo CHROMEDRIVER_PORT_4444=yes >$GITHUB_ENV
       - run: ./tool/test.sh --coverage
-      - uses: actions/upload-artifact@b4b15b8c7c6ac21ea08fcf65892d2ee8f75cf882 # v4.4.3
+      - uses: actions/upload-artifact@65c4c4a1ddee5b72f698fdd19549f0f0fb45cf08 # v4.6.0
         if: failure()
         with:
           name: failures

.github/workflows/scorecard.yml

@@ -26,7 +26,7 @@ jobs:
           results_file: results.sarif
           results_format: sarif
           publish_results: true
-      - uses: actions/upload-artifact@b4b15b8c7c6ac21ea08fcf65892d2ee8f75cf882 # v4.4.3
+      - uses: actions/upload-artifact@65c4c4a1ddee5b72f698fdd19549f0f0fb45cf08 # v4.6.0
         with:
           path: results.sarif
       - uses: github/codeql-action/upload-sarif@396bb3e45325a47dd9ef434068033c6d5bb0d11a # v3.27.3