Fix broken link (#1140)

Fix for link to `localhost`

book/pipelines.md

@@ -164,7 +164,7 @@ For instance, the above example sets the `$env.config.table.mode` configuration
 > do { $env.config.table.mode = none; ls } | table
 ```
 
-Because Nushell `$env` variables are [scoped](http://localhost:8080/book/environment.html#scoping), this means that the `table` command in the example is not affected by the
+Because Nushell `$env` variables are [scoped](https://www.nushell.sh/book/environment.html#scoping), this means that the `table` command in the example is not affected by the
 environment modification inside the `do` block and the data will not be shown with the applied configuration.
 
 When displaying data early is desired, it is possible to explicitly apply `| table` inside the scope, or use the `print` command.