Update actions/download-artifact action to v5 (#9141)

Author: renovate[bot]

.github/workflows/wheels.yml

@@ -256,7 +256,7 @@ jobs:
     runs-on: ubuntu-latest
     name: Upload wheels to scientific-python-nightly-wheels
     steps:
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@v5
         with:
           pattern: dist-*
           path: dist
@@ -278,7 +278,7 @@ jobs:
     permissions:
       id-token: write
     steps:
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@v5
         with:
           pattern: dist-*
           path: dist