[hotfix] fix config postgres_exporter 5 (!84)

Co-authored-by: denis.patrakeev <denis.patrakeev@avroid.tech>
Reviewed-on: https://git.avroid.tech/K8s/k8s-configs/pulls/84

clusters/k8s-avroid-office.prod.local/namespaces/cloud-prod/monitoring/postgres-exporter/values-override.yaml

@@ -28,11 +28,11 @@ config:
     # Specify userFile if DB username is stored in a file.
     # For example, to use with vault-injector from Hashicorp
     userSecret:
-      name: postgres-exporter-config
+      name: postgres-exporter-secret
       key: username
     # Only one of password, passwordFile, passwordSecret and pgpassfile can be specified
     passwordSecret:
-      name: postgres-exporter-config
+      name: postgres-exporter-secret
       key: password
 
   # postgres_exporter.yml