renovate add trusted dependencies

Add google/cloud-sdk and docker/build-push-action to the list of
trusted dependencies for auto-merge PRs.

Signed-off-by: André Martins <andre@cilium.io>

.github/renovate.json5

@@ -87,6 +87,7 @@
     {
       "matchPackageNames": [
         "go", // golang version directive upgrade in go.mod
+        "google/cloud-sdk", // google cloud-sdk official package name
         "grpc-ecosystem/grpc-health-probe", // Grpc ecosystem
         "kindest/node", // official kindest images
         "kubernetes-sigs/kind", // official kind dependencies