chore(deps): update ghcr.io/it-at-m/refarch/refarch-gateway docker tag to v1.4.5

Author: renovate[bot]

stack/docker-compose.yml

@@ -96,7 +96,7 @@ services:
     security_opt: *security_settings
 
   refarch-gateway:
-    image: ghcr.io/it-at-m/refarch/refarch-gateway:1.4.2@sha256:068633218c65e0e60f8d583ab465553e977449c33b70054ae2c53f05fa5c3ad9
+    image: ghcr.io/it-at-m/refarch/refarch-gateway:1.4.5@sha256:7aa12dd012ab96da2053c509c9c957bc1a1548bcba295a563dc2f0d5bab985f0
     depends_on:
       init-keycloak:
         condition: service_completed_successfully