chore(core): refresh ci npm release pin

Update `.github/workflows/ci.yml` to stage the npm package from
release `0.115.0` instead of the expired `0.74.0` artifacts.

The linked `build-test` job was failing in `stage_npm_packages.py`
before any repository code ran because the old release artifacts
expired on March 18, 2026.

Author: fcoury

.github/workflows/ci.yml

@@ -37,7 +37,7 @@ jobs:
         run: |
           set -euo pipefail
           # Use a rust-release version that includes all native binaries.
-          CODEX_VERSION=0.74.0
+          CODEX_VERSION=0.115.0
           OUTPUT_DIR="${RUNNER_TEMP}"
           python3 ./scripts/stage_npm_packages.py \
             --release-version "$CODEX_VERSION" \