Update docs/environment_variables.md

Co-authored-by: Sebastian Serth <[email protected]>

Author: arkirchner

docs/environment_variables.md

@@ -25,4 +25,4 @@ The following environment variables are specifically support in CodeHarbor and a
 | `LISTEN_ADDRESS` | `127.0.0.1` in `development` | Specifies the IP address the Vagrant VM server should attach to during development |  
 | `HEADLESS` | `false` | Enables the test environment to work without a window manager for feature tests (e.g., using Vagrant) |  
 | `BROWSER` | `chrome` | Specifies the browser to be used for system tests. Supported are `chrome` or `firefox` |  
-| `ACTIVE_STORAGE_SERVICE` | `local` | Specifies the default ActiveStorage backend in production (configured in config/storage.yml). |  
+| `ACTIVE_STORAGE_SERVICE` | `local` | Specifies the default ActiveStorage backend in production (configured in [`config/storage.yml`](../config/storage.yml)). |