doc: board: ti: k3: Sort the boards in alphabetical order

Keep the boards sorted in alphabetical order.

Signed-off-by: Nishanth Menon <nm@ti.com>
diff --git a/doc/board/ti/k3.rst b/doc/board/ti/k3.rst
index 7933c95..eb1896b 100644
--- a/doc/board/ti/k3.rst
+++ b/doc/board/ti/k3.rst
@@ -30,10 +30,10 @@
 .. toctree::
    :maxdepth: 1
 
-   j721e_evm
-   j7200_evm
    am62x_sk
    am65x_evm
+   j7200_evm
+   j721e_evm
 
 Boot Flow Overview
 ------------------