build(deps): bump google.golang.org/grpc from 1.65.0 to 1.66.0 in /ext_authz/auth/grpc-service in the examples-ext-authz group

build(deps): bump google.golang.org/grpc from 1.65.0 to 1.66.0 in /ext_authz/auth/grpc-service in the examples-ext-authz group #346