Fix swagger description of deprecated parameter
Fix swagger description of deprecated parameter

Parameter was originally deprecated in commit
83aa098245a42ad93a6b70ccd70ad593cf453a3c

Signed-off-by: Pablo Barbáchano <2db534d6341c8fef7c3f3d380b64f9115b9d896d@amazon.com>

firecracker-microvm/firecracker,firecracker-microvm/firecracker,firecracker-microvm/firecracker,firecracker-microvm/firecracker,firecracker-microvm/firecracker