Update ghcr.io/graphql-hive/gateway Docker tag to v1.4.12 (#521)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

federation-v1/gateways/hive-gateway/docker-compose.yaml

@@ -1,6 +1,6 @@
 services:
   gateway:
-    image: ghcr.io/graphql-hive/gateway:1.4.11
+    image: ghcr.io/graphql-hive/gateway:1.4.12
     container_name: gateway
     networks:
       - test