Update mantle container image to latest HEAD

Flatcar Buildbot · Flatcar Buildbot · commit 32611b6443e1 · 2023-12-15T17:41:22.000Z
diff --git a/sdk_container/.repo/manifests/mantle-container b/sdk_container/.repo/manifests/mantle-container
@@ -1 +1 @@
-ghcr.io/flatcar/mantle:git-b15d26b91a844ca5e84dc4473b2fc4820a2158f2
+ghcr.io/flatcar/mantle:git-46dbc158902f4764b5d938bdc907dea26ea3d269

Original file line number	Diff line number	Diff line change
`@@ -1 +1 @@`
`1`		`-ghcr.io/flatcar/mantle:git-b15d26b91a844ca5e84dc4473b2fc4820a2158f2`
	`1`	`+ghcr.io/flatcar/mantle:git-46dbc158902f4764b5d938bdc907dea26ea3d269`