Bump actions/download-artifact from 5 to 8 (#289)

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

Author: dependabot[bot]

.github/workflows/docs.yml

@@ -98,7 +98,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Download all docs
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v8
 
       - name: Check files
         run: |