Bump actions/download-artifact from 6 to 8 (#63)

Author: dependabot[bot]

.github/workflows/docs.yml

@@ -100,7 +100,7 @@ jobs:
 
       # Fetch the built docs from the "build" job
       - name: Download HTML documentation artifact
-        uses: actions/download-artifact@v6
+        uses: actions/download-artifact@v8
         with:
           name: docs-${{ github.sha }}
           path: doc/_build/

.github/workflows/pypi.yml

@@ -97,7 +97,7 @@ jobs:
 
       # Fetch the built archives from the "build" job
       - name: Download built archives artifact
-        uses: actions/download-artifact@v6
+        uses: actions/download-artifact@v8
         with:
           name: pypi-${{ github.sha }}
           path: dist