ci: pin Node.js 21.2.0 (#17809)

Author: mdjermanovic

.github/workflows/ci.yml

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