Fix default path for notebooks (#94)

Variable was named incorrectly

Author: mofojed

packages/code-studio/.env

@@ -7,7 +7,7 @@ REACT_APP_ROUTER_BASE_NAME=/ide/
 REACT_APP_VERSION=$npm_package_version
 REACT_APP_NAME=$npm_package_name
 REACT_APP_PLUGIN_URL=/ide/plugins/
-REACT_APP_NOTEBOOLS_URL=/notebooks
+REACT_APP_NOTEBOOKS_URL=/notebooks
 REACT_APP_INTERNAL_PLUGINS=
 REACT_APP_ENABLE_LOG_PROXY=true
 REACT_APP_SUPPORT_LINK=https://github.com/deephaven/web-client-ui/