cos-sdk: use the same SDK version with chromiumos-overlay

BUG=b/355647072
TEST=presubmit
RELEASE_NOTE=None

Change-Id: I5b9cc0b3dee56cf42e5ee13f8d98aa22cba7c519
Reviewed-on: https://cos-review.googlesource.com/c/cos/overlays/board-overlays/+/77464
Reviewed-by: Sejal Sharma <sejalsharma@google.com>
Reviewed-by: Oleksandr Tymoshenko <ovt@google.com>
Tested-by: He Gao <hegao@google.com>
diff --git a/overlay-amd64-host/prebuilt.conf b/overlay-amd64-host/prebuilt.conf
index f742ae5..fc9265f 100644
--- a/overlay-amd64-host/prebuilt.conf
+++ b/overlay-amd64-host/prebuilt.conf
@@ -1,2 +1,2 @@
 
-FULL_BINHOST="gs://cos-prebuilt/105/17324.0.0/sdk"
+FULL_BINHOST="gs://cos-prebuilt/117/18487.0.0/sdk"