[DO-1600] fix deploy prometheus in cloud-prod (!92)

[DO-1600]

Co-authored-by: denis.patrakeev <denis.patrakeev@avroid.tech>
Reviewed-on: https://git.avroid.tech/K8s/k8s-configs/pulls/92

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

@@ -169,7 +169,7 @@ serverFiles:
 # adds additional scrape configs to prometheus.yml
 # must be a string so you have to add a | after extraScrapeConfigs:
 # example adds prometheus-blackbox-exporter scrape config
-extraScrapeConfigs:
+extraScrapeConfigs: |
   - job_name: 'postgres_exporter'
     consul_sd_configs:
       - server: consul.avroid.tech