chore(deps): update ossf/scorecard-action digest to 15bc21f (#2072)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/scorecard.yml

@@ -27,7 +27,7 @@ jobs:
           persist-credentials: false
 
       - name: OSSF Scorecard action
-        uses: ossf/scorecard-action@f49aabe0b5af0936a0987cfb85d86b75731b0186
+        uses: ossf/scorecard-action@15bc21f12b2fbbb36fa93d5f2e786f6b18ffe048
         with:
           # OUTPUT: Path to file to store results
           results_file: results.sarif