Bump actions/download-artifact from 5 to 6 (#1930)

Author: dependabot[bot]

.github/workflows/nightly.yml

@@ -82,7 +82,7 @@ jobs:
       - uses: actions/checkout@v5
 
       - name: 💾 Download artifacts
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           pattern: artifact-*
           merge-multiple: true

.github/workflows/push_pull.yml

@@ -70,7 +70,7 @@ jobs:
           echo "VERSION=$(tr -d '\n' < .version)" >> $GITHUB_ENV
 
       - name: 💾 Download artifacts
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           pattern: artifact-*
           path: all-artifacts