ci: unpin Node.js 21.2.0 (#17821)

Author: fasttime

.github/workflows/ci.yml

@@ -47,7 +47,7 @@ jobs:
  strategy:
  matrix:
  os: [ubuntu-latest]
- node: ["21.2.0", 20.x, 19.x, 18.x, 17.x, 16.x, 14.x, 12.x, "12.22.0"]
+ node: [21.x, 20.x, 19.x, 18.x, 17.x, 16.x, 14.x, 12.x, "12.22.0"]
  include:
  - os: windows-latest
  node: "lts/*"