Fix link (#275)

* Fix link

* Fix link

* Simplify, and add branch

* Fix link

Author: trask

README.md

@@ -1,5 +1,5 @@
 # OpenTelemetry Java Contrib
-[![Build](https://github.com/open-telemetry/opentelemetry-java-contrib/actions/workflows/pr-build.yml/badge.svg)](https://github.com/open-telemetry/opentelemetry-java-contrib/actions/workflows/pr-build.yml)
+[![Build](https://github.com/open-telemetry/opentelemetry-java-contrib/actions/workflows/build.yml/badge.svg)](https://github.com/open-telemetry/opentelemetry-java-contrib/actions/workflows/build.yml)
 
 This project is intended to provide helpful libraries and standalone OpenTelemetry-based utilities that don't fit
 the express scope of the [OpenTelemetry Java](https://github.com/open-telemetry/opentelemetry-java) or