[Ubuntu] set default nodeJS version to 16 (#4561)

Author: mikhailkoliada

images/linux/toolsets/toolset-1804.json

@@ -280,7 +280,7 @@
     },
     "rubygems": [],
     "node": {
-        "default": "14"
+        "default": "16"
     },
     "node_modules": [
         {

images/linux/toolsets/toolset-2004.json

@@ -281,7 +281,7 @@
         "binary_name": "selenium-server"
     },
     "node": {
-        "default": "14"
+        "default": "16"
     },
     "node_modules": [
         {