Update node version check test

Author: consideRatio

tests/base/node/verify

@@ -5,7 +5,7 @@ set -ex
 # check node system package and its version
 which node
 node --version
-node --version | grep v18
+node --version | grep v20
 
 # npm comes with the nodejs conda-forge package that we have pinned, but we
 # don't have npm pinned. For example nodejs 18.13.0 brought npm 8.19.3, but