fix: default bastion ami lookup

When using a bastion and relying on looking up the default AMI it was
failing as the Ubuntu AMI's published by Canonical had changed their
description and they no longer included LTS so the CAPA lookup failed.

This change removes using LTS in the lookup. In the future we should
probably have a more robust way to look up the AMIs.

Signed-off-by: Richard Case <richard.case@outlook.com>

Author: richardcase

pkg/cloud/services/ec2/ami.go

@@ -60,7 +60,7 @@ const (
 	ubuntuOwnerIDUsGov = "513442679011"
 
 	// Description regex for fetching Ubuntu AMIs for bastion host.
-	ubuntuImageDescription = "Canonical??Ubuntu??24.04?LTS??amd64?noble?image*"
+	ubuntuImageDescription = "Canonical??Ubuntu??24.04??amd64?noble?image*"
 
 	// defaultMachineAMILookupBaseOS is the default base operating system to use
 	// when looking up machine AMIs.