fix: specify --repo when calling gh (#3806)

Often, `gh` infers `--repo` when it is run from a Git clone, but our
`publish-npm` step is designed to avoid the overhead of cloning the
repo, so add the `--repo` option explicitly to fix things.

.github/workflows/rust-release.yml

@@ -260,6 +260,7 @@ jobs:
           tag="${{ needs.release.outputs.tag }}"
           mkdir -p dist/npm
           gh release download "$tag" \
+            --repo "${GITHUB_REPOSITORY}" \
             --pattern "codex-npm-${version}.tgz" \
             --dir dist/npm