Bump github.com/stretchr/testify in /receiver/opencensusreceiver

Bumps [github.com/stretchr/testify](https://github.com/stretchr/testify) from 1.8.4 to 1.11.1.
- [Release notes](https://github.com/stretchr/testify/releases)
- [Commits](stretchr/testify@v1.8.4...v1.11.1)

---
updated-dependencies:
- dependency-name: github.com/stretchr/testify
  dependency-version: 1.11.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

receiver/opencensusreceiver/go.mod

@@ -11,7 +11,7 @@ require (
 	github.com/open-telemetry/opentelemetry-collector-contrib/pkg/translator/opencensus v0.81.0
 	github.com/rs/cors v1.9.0
 	github.com/soheilhy/cmux v0.1.5
-	github.com/stretchr/testify v1.8.4
+	github.com/stretchr/testify v1.11.1
 	go.opentelemetry.io/collector v0.81.0
 	go.opentelemetry.io/collector/component v0.81.0
 	go.opentelemetry.io/collector/config/configgrpc v0.81.0