Update README.md (#1344)

Author: devactivity-team

README.md

@@ -32,6 +32,8 @@ You can also look at the read-only repositories, which live in the
 
 ## Contributing
 
+[![GitHub repo Good Issues for newbies](https://img.shields.io/github/issues/open-telemetry/opentelemetry-php/good%20first%20issue?style=flat&logo=github&logoColor=green&label=Good%20First%20issues)](https://github.com/open-telemetry/opentelemetry-php/issues?q=is%3Aopen+is%3Aissue+label%3A%22good+first+issue%22) [![GitHub Help Wanted issues](https://img.shields.io/github/issues/open-telemetry/opentelemetry-php/help%20wanted?style=flat&logo=github&logoColor=b545d1&label=%22Help%20Wanted%22%20issues)](https://github.com/open-telemetry/opentelemetry-php/issues?q=is%3Aopen+is%3Aissue+label%3A%22help+wanted%22) [![GitHub Help Wanted PRs](https://img.shields.io/github/issues-pr/open-telemetry/opentelemetry-php/help%20wanted?style=flat&logo=github&logoColor=b545d1&label=%22Help%20Wanted%22%20PRs)](https://github.com/open-telemetry/opentelemetry-php/pulls?q=is%3Aopen+is%3Aissue+label%3A%22help+wanted%22) [![GitHub repo Issues](https://img.shields.io/github/issues/open-telemetry/opentelemetry-php?style=flat&logo=github&logoColor=red&label=Issues)](https://github.com/open-telemetry/opentelemetry-php/issues?q=is%3Aopen)
+
 We would love to have you on board, please see our [Development README](./DEVELOPMENT.md) and [Contributing README](./CONTRIBUTING.md).
 
 ## Specification conformance