style: format code with Gofumpt and Prettier

This commit fixes the style issues introduced in e3ab1d2 according to the output
from Gofumpt and Prettier.

Details: #2485

docs/performance/continuous-benchmark.md

@@ -482,23 +482,21 @@ For information on building a monitoring environment, please refer to [Observabi
 To monitor metrics about continuous benchmarking, please edit `ValdBenchmarkOperatorRelease` as follows:
 
 ```yaml
-...
+---
 # @schema {"name": "observability", "type": "object"}
 observability:
   # @schema {"name": "observability.enabled", "type": "boolean"}
   enabled: true
   # @schema {"name": "observability.otlp", "type": "object"}
   otlp:
     # @schema {"name": "observability.otlp.collector_endpoint", "type": "string"}
-    # Please confirm correct collector_endpoint 
+    # Please confirm correct collector_endpoint
     collector_endpoint: "opentelemetry-collector-collector.default.svc.cluster.local:4317"
   trace:
     # @schema {"name": "observability.trace.enabled", "type": "boolean"}
     enabled: true
-...
 ```
 
 After apply it, the metrics can be shown on the Grafana dashboard like as below.
 
 <img src="../../assets/docs/performance/benchmark-grafana.png" />
-