Bump go.opentelemetry.io/otel/trace in /example/zipkin

Bumps [go.opentelemetry.io/otel/trace](https://github.com/open-telemetry/opentelemetry-go) from 1.0.0 to 1.0.1.
- [Release notes](https://github.com/open-telemetry/opentelemetry-go/releases)
- [Changelog](https://github.com/open-telemetry/opentelemetry-go/blob/main/CHANGELOG.md)
- [Commits](open-telemetry/opentelemetry-go@v1.0.0...v1.0.1)

---
updated-dependencies:
- dependency-name: go.opentelemetry.io/otel/trace
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

example/zipkin/go.mod

@@ -12,7 +12,7 @@ require (
 	go.opentelemetry.io/otel v1.0.0
 	go.opentelemetry.io/otel/exporters/zipkin v1.0.0
 	go.opentelemetry.io/otel/sdk v1.0.0
-	go.opentelemetry.io/otel/trace v1.0.0
+	go.opentelemetry.io/otel/trace v1.0.1
 )
 
 replace go.opentelemetry.io/otel/bridge/opencensus => ../../bridge/opencensus