update sources to Ubuntu-5.3.0-20.21

(generated with debian/scripts/import-upstream-tag)

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

diff --git a/submodules/ubuntu-eoan b/submodules/ubuntu-eoan
index 46283821cccb4fb54bf7530061400c89cbe83a36..6c136a9fc0a0c71c64c734cef777c5251467854e 160000 (submodule)
--- a/submodules/ubuntu-eoan
+++ b/submodules/ubuntu-eoan
@@ -1 +1 @@
-Subproject commit 46283821cccb4fb54bf7530061400c89cbe83a36
+Subproject commit 6c136a9fc0a0c71c64c734cef777c5251467854e