Update default password value (#396)

Author: crqch

docs/services/filebrowser.md

@@ -14,7 +14,7 @@ Filebrowser provides a file managing interface within a specified directory and
 - Deploy Filebrowser using Coolify template
 - In the Filebrowser UI login with credentials:
   - Username: `admin`
-  - Password: `admin`
+  - Password: randomly generated, viewable in the logs
 
 ## Screenshots