Update mantle container image to latest HEAD

Flatcar Buildbot · Flatcar Buildbot · commit 05ef9541d547 · 2023-11-30T21:00:48.000Z
diff --git a/sdk_container/.repo/manifests/mantle-container b/sdk_container/.repo/manifests/mantle-container
@@ -1 +1 @@
-ghcr.io/flatcar/mantle:git-ccdd74640f343381a10111d5387ee7ff5957fb96
+ghcr.io/flatcar/mantle:git-b15d26b91a844ca5e84dc4473b2fc4820a2158f2

Original file line number	Diff line number	Diff line change
`@@ -1 +1 @@`
`1`		`-ghcr.io/flatcar/mantle:git-ccdd74640f343381a10111d5387ee7ff5957fb96`
	`1`	`+ghcr.io/flatcar/mantle:git-b15d26b91a844ca5e84dc4473b2fc4820a2158f2`