ci: bump actions/download-artifact from 7 to 8 (#1776)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/integration-test.yml

@@ -92,7 +92,7 @@ jobs:
           persist-credentials: false
 
       - name: Download test results
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: test-results
 

.github/workflows/pypi-publish-on-release.yml

@@ -78,7 +78,7 @@ jobs:
 
     steps:
     - name: Download all the dists
-      uses: actions/download-artifact@v7
+      uses: actions/download-artifact@v8
       with:
         name: python-package-distributions
         path: dist/