Revert "fix(compose): stop pointing at the tag the build dropped" for dtek_notif

dtek-notif is being picked up again, so leave its compose alone. It is
also the one image not rebuilt since the build dropped :latest, so
:prod does not exist for it yet - unlike the other six, which resolve.
Keeping this file out of the change also keeps dtek_notif/* out of the
build's changed-service detector, so pushing does not build an image
nobody asked for.

dtek_notif/docker-compose.yaml

@@ -3,7 +3,7 @@ services:
     build:
       context: .
       dockerfile: Dockerfile
-    image: gcr.forust.xyz/forust/dtek-notif:prod
+    image: gcr.forust.xyz/forust/dtek-notif:latest
     pull_policy: build
     restart: unless-stopped
     environment: