Bump io.opentelemetry.contrib:opentelemetry-samplers (newrelic#469)

Bumps [io.opentelemetry.contrib:opentelemetry-samplers](https://github.com/open-telemetry/opentelemetry-java-contrib) from 1.30.0-alpha to 1.31.0-alpha.
- [Release notes](https://github.com/open-telemetry/opentelemetry-java-contrib/releases)
- [Changelog](https://github.com/open-telemetry/opentelemetry-java-contrib/blob/main/CHANGELOG.md)
- [Commits](https://github.com/open-telemetry/opentelemetry-java-contrib/commits)

---
updated-dependencies:
- dependency-name: io.opentelemetry.contrib:opentelemetry-samplers
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

other-examples/java/agent-nr-config/config-extension/build.gradle

@@ -20,5 +20,5 @@ dependencies {
   compileOnly 'io.opentelemetry:opentelemetry-sdk-extension-autoconfigure'
   compileOnly 'io.opentelemetry.semconv:opentelemetry-semconv:1.21.0-alpha'
 
-  implementation "io.opentelemetry.contrib:opentelemetry-samplers:1.30.0-alpha"
+  implementation "io.opentelemetry.contrib:opentelemetry-samplers:1.31.0-alpha"
 }