fix(ci): upgrade download-artifact v4.3.0 → v8.0.1 (Node 24) (#265)

actions/download-artifact@v4.3.0 uses Node.js 20 which GitHub is
deprecating (forced Node 24 on June 16, 2026; removed Sep 16, 2026).
Upgrade to v8.0.1 which runs natively on Node 24.

Closes #261

Co-authored-by: bgagent <345885+scottschreckengaust@users.noreply.github.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: scottschreckengaust

.github/workflows/deploy.yml

@@ -22,7 +22,7 @@ jobs:
       run_id: ${{ github.event.workflow_run.id }}
     steps:
       - name: Download deploy intent
-        uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
+        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
         with:
           name: deploy-intent
           run-id: ${{ github.event.workflow_run.id }}
@@ -145,7 +145,7 @@ jobs:
           persist-credentials: false
 
       - name: Download CDK artifact (${{ matrix.compute_type }})
-        uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
+        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
         with:
           name: cdk-${{ matrix.compute_type }}-out
           path: cdk/
@@ -220,7 +220,7 @@ jobs:
           persist-credentials: false
 
       - name: Download CDK artifact (${{ matrix.compute_type }})
-        uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
+        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
         with:
           name: cdk-${{ matrix.compute_type }}-out
           path: cdk/