09/28 cos-gpu-installer:v2 release

RELEASE_NOTE=change fallback version for drivers to R535 for L4,H100
devices.
BUG=b/300140748

Change-Id: Ib34ac85c37a97012beba56a94542547d525d0375
Reviewed-on: https://cos-review.googlesource.com/c/cos/tools/+/58067
Tested-by: Arnav Kansal <rnv@google.com>
Cloud-Build: GCB Service account <228075978874@cloudbuild.gserviceaccount.com>
Reviewed-by: Robert Kolchmeyer <rkolchmeyer@google.com>
diff --git a/release/release-versions.yaml b/release/release-versions.yaml
index e304765..51f85ca 100644
--- a/release/release-versions.yaml
+++ b/release/release-versions.yaml
@@ -18,9 +18,9 @@
     - "v20230815"
 - staging_container_name: "cos-gpu-installer"
   release_container_name: "cos-gpu-installer"
-  build_commit: "a19a377b0659e7a2b2690dc3ac8fbfac46363f46"
+  build_commit: "396de07e4bc0ed50f889a38df8355ad13d39043a"
   release_tags:
-    - "v2.1.8"
+    - "v2.1.9"
 - staging_container_name: "cos-gpu-driver-builder"
   release_container_name: "cos-gpu-driver-builder"
   build_commit: "d742bf7c5f9b3081f8467ce7236c2fa8c0a3cb63"