doc: release: 4.1: add CONFIG_FILE_SYSTEM_SHELL_MOUNT_COMMAND

This allows the mount shell subcommand to be optionally disabled.

Signed-off-by: Xudong Zheng <[email protected]>

Author: xudongzheng

doc/releases/release-notes-4.1.rst

@@ -375,6 +375,10 @@ Libraries / Subsystems
 
 * Storage
 
+  * Shell: :kconfig:option:`CONFIG_FILE_SYSTEM_SHELL_MOUNT_COMMAND` was added,
+    allowing the mount subcommand to be optionally disabled. This can reduce
+    flash and RAM usage since it requires the heap to be present.
+
 * Task Watchdog
 
 * POSIX API