docs/libnbd-security.pod: Assign CVE-2024-7383

CVE-2024-7383 was assigned to the (already published & fixed) flaws
found in libnbd certificate checking.

Reported-by: Jon Szymaniak
Thanks: Mauro Matteo Cascella

docs/libnbd-security.pod

@@ -51,7 +51,8 @@ assertion failure for 64-bit flags passed to nbd_block_status(3)
 See the full announcement here:
 L<https://lists.libguestfs.org/archives/list/guestfs@lists.libguestfs.org/thread/5CRC7LRTN35WPZZ4BT6NAMH4JGMF47IK/>
 
-=head2 multiple flaws in TLS server certificate checking
+=head2 CVE-2024-7383
+multiple flaws in TLS server certificate checking
 
 See the full announcement here:
 L<https://lists.libguestfs.org/archives/list/guestfs@lists.libguestfs.org/thread/LHR3BW6RJ7K4BJBQIYV3GTZLSY27VZO2/>