Fix 25k Ref Arch Internal Load Balancer specs

doc/administration/reference_architectures/25k_users.md

@@ -21,7 +21,7 @@ full list of reference architectures, see
 | Consul                                  | 3           | 2 vCPU, 1.8 GB memory   | n1-highcpu-2    | c5.large    | F2s v2   |
 | PostgreSQL                              | 3           | 8 vCPU, 30 GB memory    | n1-standard-8   | m5.2xlarge  | D8s v3   |
 | PgBouncer                               | 3           | 2 vCPU, 1.8 GB memory   | n1-highcpu-2    | c5.large    | F2s v2   |
-| Internal load balancing node            | 1           | 2 vCPU, 1.8 GB memory   | n1-highcpu-2    | c5.large    | F2s v2   |
+| Internal load balancing node            | 1           | 4 vCPU, 3.6GB memory    | n1-highcpu-4    | c5.large    | F2s v2   |
 | Redis - Cache                           | 3           | 4 vCPU, 15 GB memory    | n1-standard-4   | m5.xlarge   | D4s v3   |
 | Redis - Queues / Shared State           | 3           | 4 vCPU, 15 GB memory    | n1-standard-4   | m5.xlarge   | D4s v3   |
 | Redis Sentinel - Cache                  | 3           | 1 vCPU, 1.7 GB memory   | g1-small        | t2.small    | B1MS     |