update readme

Author: ericpaulsen

README.md

@@ -258,7 +258,7 @@ values which are defined [here](https://github.com/grafana/helm-charts/tree/main
 | global.dashboards.timerange | string | `"12h"` | how far back dashboards should look |
 | global.externalScheme | string | `"http"` |  |
 | global.externalZone | string | `"svc.cluster.local"` |  |
-| global.postgres | object | `{"alerts":{"groups":{"Basic":{"delay":"1m","enabled":true},"Connections":{"delay":"5m","enabled":true,"thresholds":{"critical":0.9,"notify":0.5,"warning":0.8}},"Notifications":{"delay":"15m","enabled":true,"thresholds":{"critical":0.9,"notify":0.5,"warning":0.8}}}},"database":"coder","exporter":{"image":"quay.io/prometheuscommunity/postgres-exporter"},"hostname":"localhost","mountSecret":"secret-postgres","password":null,"port":5432,"sslmode":"disable","username":"coder"}` | postgres connection information NOTE: these settings are global so we can parameterise some values which get rendered by subcharts |
+| global.postgres | object | `{"alerts":{"groups":{"Basic":{"delay":"1m","enabled":true},"Connections":{"delay":"5m","enabled":true,"thresholds":{"critical":0.9,"notify":0.5,"warning":0.8}},"Notifications":{"delay":"15m","enabled":true,"thresholds":{"critical":0.9,"notify":0.5,"warning":0.8}}}},"database":"coder","exporter":{"image":"quay.io/prometheuscommunity/postgres-exporter"},"hostname":"localhost","mountSecret":"secret-postgres","password":null,"port":5432,"sslmode":"disable","sslrootcert":"/home/coder/.postgresql/rootcert.pem","username":"coder","volumeMounts":[{"mountPath":"/home/coder/.postgresql","name":"pg-certs-mount","readOnly":true}],"volumes":[{"configMap":{"name":"pg-certs-mount-config-map"},"name":"pg-certs-mount"}]}` | postgres connection information NOTE: these settings are global so we can parameterise some values which get rendered by subcharts |
 | global.postgres.alerts | object | `{"groups":{"Basic":{"delay":"1m","enabled":true},"Connections":{"delay":"5m","enabled":true,"thresholds":{"critical":0.9,"notify":0.5,"warning":0.8}},"Notifications":{"delay":"15m","enabled":true,"thresholds":{"critical":0.9,"notify":0.5,"warning":0.8}}}}` | alerts for postgres |
 | global.telemetry | object | `{"metrics":{"scrape_interval":"15s","scrape_timeout":"12s"}}` | control telemetry collection |
 | global.telemetry.metrics | object | `{"scrape_interval":"15s","scrape_timeout":"12s"}` | control metric collection |