Bump upload-artifact to v7 and download-artifact to v8 (Node 24)

Author: parttimenerd

.github/workflows/build-and-snapshot.yml

@@ -122,7 +122,7 @@ jobs:
           python3 .github/workflows/build.py
 
       - name: Upload artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: cf-cli-java-plugin-${{ matrix.os }}
           path: |
@@ -153,7 +153,7 @@ jobs:
           pip install PyYAML
 
       - name: Download all artifacts
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v8
         with:
           path: dist/