Fix build status badge in the README
<p align="center">
<a href="https://github.com/open-telemetry/opentelemetry-java-instrumentation/actions/workflows/build.yml">
- <img alt="Build Status" src="https://img.shields.io/github/workflow/status/open-telemetry/opentelemetry-java-instrumentation/Build?style=for-the-badge">
+ <img alt="Build Status" src="https://img.shields.io/github/actions/workflow/status/open-telemetry/opentelemetry-java-instrumentation/build.yml?branch=main&style=for-the-badge">
</a>
<a href="https://github.com/open-telemetry/opentelemetry-java-instrumentation/releases">
<img alt="GitHub release (latest by date including pre-releases)" src="https://img.shields.io/github/v/release/open-telemetry/opentelemetry-java-instrumentation?include_prereleases&style=for-the-badge">
<p align="center">
<strong>
- <a href="CONTRIBUTING.md">Contributing<a/>
+ <a href="CONTRIBUTING.md">Contributing</a>
&nbsp;&nbsp;&bull;&nbsp;&nbsp;
- <a href="docs/scope.md">Scope<a/>
+ <a href="docs/scope.md">Scope</a>
</strong>
</p>
