fix: Update realtime image version to v2.57.3 (#4374)

Author: avallete

pkg/config/templates/Dockerfile

@@ -11,7 +11,7 @@ FROM supabase/edge-runtime:v1.69.15 AS edgeruntime
 FROM timberio/vector:0.28.1-alpine AS vector
 FROM supabase/supavisor:2.7.3 AS supavisor
 FROM supabase/gotrue:v2.180.0 AS gotrue
-FROM supabase/realtime:v2.57.2 AS realtime
+FROM supabase/realtime:v2.57.3 AS realtime
 FROM supabase/storage-api:v1.28.2 AS storage
 FROM supabase/logflare:1.23.2 AS logflare
 # Append to JobImages when adding new dependencies below