build(deps): bump actions/upload-artifact from 5 to 6 (m154k1#11)

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

Author: dependabot[bot]

.github/workflows/build.yml

@@ -60,7 +60,7 @@ jobs:
 
       - name: Upload Artifact
         id: upload
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: mpv-macos-26-arm64
           path: mpv.tar.gz