add missing version

Signed-off-by: Bob Callaway <[email protected]>

Author: bobcallaway

.ko.yaml

@@ -1,7 +1,7 @@
 ---
 defaultBaseImage: gcr.io/distroless/static-debian12:nonroot
 baseImageOverrides:
-  github.com/sigstore/scaffolding/cmd/cloudsqlproxy: gcr.io/cloud-sql-connectors/cloud-sql-proxy:
+  github.com/sigstore/scaffolding/cmd/cloudsqlproxy: gcr.io/cloud-sql-connectors/cloud-sql-proxy:2.19.0-alpine
 
 builds:
   - id: ctlog-createctconfig