chore(deps): update dawidd6/action-download-artifact action to v21 (#14801)

Author: renovate[bot]

.github/workflows/size-report.yml

@@ -37,7 +37,7 @@ jobs:
         run: pnpm install
 
       - name: Download Size Data
-        uses: dawidd6/action-download-artifact@8305c0f1062bb0d184d09ef4493ecb9288447732 # v20
+        uses: dawidd6/action-download-artifact@b6e2e70617bc3265edd6dab6c906732b2f1ae151 # v21
         with:
           name: size-data
           run_id: ${{ github.event.workflow_run.id }}
@@ -56,7 +56,7 @@ jobs:
           path: temp/size/base.txt
 
       - name: Download Previous Size Data
-        uses: dawidd6/action-download-artifact@8305c0f1062bb0d184d09ef4493ecb9288447732 # v20
+        uses: dawidd6/action-download-artifact@b6e2e70617bc3265edd6dab6c906732b2f1ae151 # v21
         with:
           branch: ${{ steps.pr-base.outputs.content }}
           workflow: size-data.yml