update submodule to Proxmox-6.2.11-1

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>

diff --git a/submodules/ubuntu-kernel b/submodules/ubuntu-kernel
index f384010f9ee2a591f1e725fae5a4efbfbad864b3..d3bf8f1da09634a8b4e661d022702ead6c0dadfb 160000 (submodule)
--- a/submodules/ubuntu-kernel
+++ b/submodules/ubuntu-kernel
@@ -1 +1 @@
-Subproject commit f384010f9ee2a591f1e725fae5a4efbfbad864b3
+Subproject commit d3bf8f1da09634a8b4e661d022702ead6c0dadfb