sdk/metric: package example includes Cardinality Limits (#7165)

Part of #6979
Towards #6887

## What

- Examples demonstrate how to configure and use the feature.

CHANGELOG.md

@@ -41,7 +41,7 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
   - `RPCGRPCResponseMetadata`
 - Add `ErrorType` attribute helper function to the `go.opentelmetry.io/otel/semconv/v1.34.0` package. (#6962)
 - Add `WithAllowKeyDuplication` in `go.opentelemetry.io/otel/sdk/log` which can be used to disable deduplication for log records. (#6968)
-- Add `WithCardinalityLimit` option to configure the cardinality limit in `go.opentelemetry.io/otel/sdk/metric`. (#6996, #7065, #7081, #7164)
+- Add `WithCardinalityLimit` option to configure the cardinality limit in `go.opentelemetry.io/otel/sdk/metric`. (#6996, #7065, #7081, #7164, #7165)
 - Add `Clone` method to `Record` in `go.opentelemetry.io/otel/log` that returns a copy of the record with no shared state. (#7001)
 - The `go.opentelemetry.io/otel/semconv/v1.36.0` package.
   The package contains semantic conventions from the `v1.36.0` version of the OpenTelemetry Semantic Conventions.

sdk/metric/example_test.go

@@ -45,6 +45,7 @@ func Example() {
 	meterProvider := metric.NewMeterProvider(
 		metric.WithResource(res),
 		metric.WithReader(reader),
+		metric.WithCardinalityLimit(2000),
 	)
 
 	// Handle shutdown properly so that nothing leaks.