Update mantle container image to latest HEAD

Flatcar Buildbot · Flatcar Buildbot · commit b3732e44002f · 2024-04-08T07:11:07.000Z
diff --git a/sdk_container/.repo/manifests/mantle-container b/sdk_container/.repo/manifests/mantle-container
@@ -1 +1 @@
-ghcr.io/flatcar/mantle:git-34752eefc2695c79dce7d1f270191235ae4d9268
+ghcr.io/flatcar/mantle:git-c46820fd6e874191b3493ddfa6da5594ae767f14

Original file line number	Diff line number	Diff line change
`@@ -1 +1 @@`
`1`		`-ghcr.io/flatcar/mantle:git-34752eefc2695c79dce7d1f270191235ae4d9268`
	`1`	`+ghcr.io/flatcar/mantle:git-c46820fd6e874191b3493ddfa6da5594ae767f14`