[grafana] set the interval for the serviceMonitor to 30s so that irat…

…e()[1m] queries in the operators default Grafana dashboard work

Signed-off-by: Marcel Weinberg <mweinberg-os@email.de>

charts/grafana/values.yaml

@@ -202,7 +202,7 @@ serviceMonitor:
   path: /metrics
   #  namespace: monitoring  (defaults to use the namespace this chart is deployed to)
   labels: {}
-  interval: 1m
+  interval: 30s
   scheme: http
   tlsConfig: {}
   scrapeTimeout: 30s