doc: board: ti: k3: Fixup alt text for openocd sequence

Fix up OpenOCD setup sequence

Fixes: effe5085 ("doc: board: ti: k3: Add a guide to debugging with OpenOCD")
Reported-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Signed-off-by: Nishanth Menon <nm@ti.com>