DROP: Use mantle kola PR ref

pothos · pothos · commit cd18daa76d2e · 2025-12-18T12:49:49.000+09:00
Signed-off-by: Kai Lueke &lt;kailuke@microsoft.com&gt;
diff --git a/sdk_container/.repo/manifests/mantle-container b/sdk_container/.repo/manifests/mantle-container
@@ -1 +1 @@
-ghcr.io/flatcar/mantle:git-6610630deab5366a448ac855f178f4f611e88e38
+ghcr.io/flatcar/mantle:pr-720

Original file line number	Diff line number	Diff line change
`@@ -1 +1 @@`
`1`		`-ghcr.io/flatcar/mantle:git-6610630deab5366a448ac855f178f4f611e88e38`
	`1`	`+ghcr.io/flatcar/mantle:pr-720`