Update README.md

Bump OTel SDK version

README.md

@@ -3,7 +3,7 @@
 [![Jenkins API Plugin](https://img.shields.io/jenkins/plugin/v/opentelemetry.svg)](https://plugins.jenkins.io/opentelemetry-api)
 [![GitHub release](https://img.shields.io/github/release/jenkinsci/opentelemetry-api-plugin.svg?label=changelog)](https://github.com/jenkinsci/opentelemetry-api-plugin/releases/latest)
 [![Jenkins API Plugin Installs](https://img.shields.io/jenkins/plugin/i/opentelemetry-api.svg?color=blue)](https://plugins.jenkins.io/opentelemetry-api)
-[![Otel SDK](https://img.shields.io/badge/otel--sdk-1.39.0-blue?style=flat&logo=opentelemetry)](https://github.com/open-telemetry/opentelemetry-java/releases/tag/v1.39.0)
+[![Otel SDK](https://img.shields.io/badge/otel--sdk-1.40.0-blue?style=flat&logo=opentelemetry)](https://github.com/open-telemetry/opentelemetry-java/releases/tag/v1.40.0)
 
 # OpenTelemetry API Plugin