Switch to building with Depot

Change-Id: I4547e671e11f76e6776192cc68040d5e2ff61be9
(cherry picked from commit 564caa8bd7f1cf771958a97b8fff7c9bef90e447)
diff --git a/images/openvswitch/Dockerfile b/images/openvswitch/Dockerfile
index 6bf6c76..60ba503 100644
--- a/images/openvswitch/Dockerfile
+++ b/images/openvswitch/Dockerfile
@@ -1,7 +1,8 @@
-# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: © 2025 VEXXHOST, Inc.
+# SPDX-License-Identifier: GPL-3.0-or-later
 # Atmosphere-Rebuild-Time: 2024-06-26T17:38:39Z
 
-FROM quay.io/centos/centos:stream9
+FROM centos
 ADD --chmod=755 https://github.com/krallin/tini/releases/download/v0.19.0/tini /tini
 ARG OVS_SERIES=3.2
 ARG OVS_VERSION=${OVS_SERIES}.0-80