doc: add <vm_id> parameter to the "vm_console" command description

Add the <vm_id> parameter to the documentation for the ACRN shell
"vm_console" command.

Signed-off-by: Geoffroy Van Cutsem <geoffroy.vancutsem@intel.com>

Author: Geoffroy Van Cutsem

doc/user-guides/acrn-shell.rst

@@ -22,7 +22,7 @@ The ACRN hypervisor shell supports the following commands:
    * - dumpmem <hva> <length>
      - Dump host memory, starting at a given address, and for a given length
        (in bytes)
-   * - vm_console
+   * - vm_console <vm_id>
      - Switch to the VM's console. Use :kbd:`Ctrl+Spacebar` to return to the ACRN
        shell console
    * - int