vendor: update buildah to latest main

Includes one breaking change for the flag as BuildOutputs now accept a
slice.

Signed-off-by: Paul Holzinger <pholzing@redhat.com>

vendor/github.com/containers/buildah/pkg/cli/common.go

@@ -108,7 +108,7 @@ type BudResults struct {
 	SkipUnusedStages    bool
 	Stdin               bool
 	Tag                 []string
-	BuildOutput         string
+	BuildOutputs        []string
 	Target              string
 	TLSVerify           bool
 	Jobs                int
@@ -307,7 +307,7 @@ newer:   only pull base and SBOM scanner images when newer images exist on the r
 	fs.StringArrayVar(&flags.SSH, "ssh", []string{}, "SSH agent socket or keys to expose to the build. (format: default|<id>[=<socket>|<key>[,<key>]])")
 	fs.BoolVar(&flags.Stdin, "stdin", false, "pass stdin into containers")
 	fs.StringArrayVarP(&flags.Tag, "tag", "t", []string{}, "tagged `name` to apply to the built image")
-	fs.StringVarP(&flags.BuildOutput, "output", "o", "", "output destination (format: type=local,dest=path)")
+	fs.StringArrayVarP(&flags.BuildOutputs, "output", "o", nil, "output destination (format: type=local,dest=path)")
 	fs.StringVar(&flags.Target, "target", "", "set the target build stage to build")
 	fs.Int64Var(&flags.Timestamp, "timestamp", 0, "set created timestamp to the specified epoch seconds to allow for deterministic builds, defaults to current time")
 	fs.BoolVar(&flags.TLSVerify, "tls-verify", true, "require HTTPS and verify certificates when accessing the registry")