cos-dkms v0.3.16 release

Release cos-dkms with Go toolchain and builder upgraded to 1.26.6
to resolve CVE-2026-33818 and CVE-2026-56865.

BUG=b/548593947
TEST=n/a
RELEASE_NOTE=NONE

Change-Id: Ib3444d78d0ddcddfa648294335fa86180caf234c
Reviewed-on: https://cos-review.googlesource.com/c/cos/tools/+/188087
Tested-by: Chenglong Tang <chenglongtang@google.com>
Cloud-Build: 228075978874@cloudbuild.gserviceaccount.com <228075978874@cloudbuild.gserviceaccount.com>
Reviewed-by: Kevin Berry <kpberry@google.com>

release/release-versions.yaml

diff --git a/release/release-versions.yaml b/release/release-versions.yaml
index f2d2609..2c7d161 100644
--- a/release/release-versions.yaml
+++ b/release/release-versions.yaml
@@ -48,10 +48,10 @@
   multi-arch: false
 - staging_container_name: "cos-dkms"
   release_container_name: "cos-dkms"
-  build_tag: "a629d0c-be3e149e-0bbe-4df3-8340-16f70860faf3"
+  build_tag: "7bd527c-e6907622-68bb-44f3-bb2a-ef80e7c165a5"
   release_tags:
     - "latest"
-    - "v0.3.15"
+    - "v0.3.16"
   multi-arch: true
 - staging_container_name: "oem-preloader"
   release_container_name: "oem-preloader"