[codex] publish DotSlash alongside npm (#27528)

In https://github.com/openai/codex/actions/runs/27308011621,
preparing and publishing the three DotSlash configurations took 72
seconds after creating the GitHub release. npm publication could not
start until those independent steps finished.

Move DotSlash publication to a sibling job that starts after the GitHub
release. npm and DotSlash can then proceed concurrently, reducing total
release time by about one minute.

.github/workflows/rust-release.yml

@@ -1227,6 +1227,18 @@ jobs:
           # (e.g. -alpha, -beta). Otherwise publish a normal release.
           prerelease: ${{ contains(steps.release_name.outputs.name, '-') }}
 
+  publish-dotslash:
+    name: publish-dotslash
+    needs: release
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
       - uses: facebook/dotslash-publish-release@9c9ec027515c34db9282a09a25a9cab5880b2c52 # v2
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}