fix(fls): update

Author: SamyOubouaziz

pages/file-storage/quickstart.mdx

@@ -137,7 +137,7 @@ Your file system is now mounted and accessible from the specified mount point in
 5. Run the following command. Make sure to replace the placeholder and mount point with the appropriate values:
 
     ```sh
-    umount /mnt/my_file_system
+    umount /mnt/my_fs
     ```
 
 Your file system is now unmounted from the specified Instance.