build: update node to avoid strict-engines error caused by npm

Avoids:

```
Lockfile is up to date, resolution step is skipped
 ERR_PNPM_UNSUPPORTED_ENGINE  Unsupported environment (bad pnpm and/or Node.js version)

Your Node version is incompatible with "[email protected]".

Expected version: ^20.17.0 || >=22.9.0
Got: v20.11.1
```

Note that we won't update the WORKSPACE test version as that would mean
we need to update the Node engines for shipped packages; and we can't do
this right now without introducing a breaking change.

Author: devversion

.nvmrc

@@ -1 +1 @@
-20.11.1
+20.17.0