Fix GitHub Actions: Update artifact actions to v4

The v3 versions of upload-artifact and download-artifact are deprecated.
Updated to v4 to fix the workflow.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

1 files changed, 2 insertions, 2 deletions

diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 4a040e7..d697d84 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -85,7 +85,7 @@ jobs:
           cd ../../..
 
       - name: Upload artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: oar-p2p-${{ matrix.platform }}
           path: oar-p2p-${{ github.ref_name }}-${{ matrix.platform }}.tar.gz
@@ -100,7 +100,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Download artifacts
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           path: artifacts