Fix NetBSD CI wrt #278

Author: hasufell

.cirrus.yml

@@ -28,7 +28,7 @@ task:
   name: NetBSD
   compute_engine_instance:
     image_project: pg-ci-images
-    image: family/pg-ci-netbsd-vanilla-9-2
+    image: family/pg-ci-netbsd-vanilla-9-3
     platform: netbsd
   install_script:
     - export PKG_PATH="http://cdn.NetBSD.org/pub/pkgsrc/packages/NetBSD/$(uname -p)/$(uname -r|cut -f '1 2' -d.)/All/"