feat: update Flannel to v0.26.6

See https://github.com/flannel-io/flannel/releases/tag/v0.26.6

Signed-off-by: Andrey Smirnov <andrey.smirnov@siderolabs.com>

Author: smira

hack/release.toml

@@ -23,7 +23,7 @@ preface = """
 * runc: 1.2.6
 * containerd: 2.0.4
 * etcd: 3.5.20
-* Flannel: 0.26.4
+* Flannel: 0.26.6
 * Kubernetes: 1.33.0-beta.0
 
 Talos is built with Go 1.24.2.

pkg/flannel/template.go

@@ -1163,7 +1163,7 @@ const (
 	DashboardTTY = 2
 
 	// FlannelVersion is the version of flannel to use.
-	FlannelVersion = "v0.26.5"
+	FlannelVersion = "v0.26.6"
 
 	// PlatformMetal is the name of the metal platform.
 	PlatformMetal = "metal"