Upgrade node to 18.20 (#40661)

* Upgrade node to 18.20

* Trigger CI

* Try 20 again

* Revert "Try 20 again"

This reverts commit 8f4b39e7a64f1fae7c60decfb91ea87aff81f587.

* Revert change

* Add nvmrc to the frontend_sources list

.github/file-paths.yaml

@@ -27,6 +27,7 @@ frontend_sources: &frontend_sources
   - "postcss.config.js"
   - "webpack.config.js"
   - "webpack.static-viz.config.js"
+  - ".nvmrc"
 
 frontend_specs: &frontend_specs
   - *shared_specs

.nvmrc

-v18.16.1
+v18.20.0