Fix open PR badge URL

Author: Manpreet Singh

README.md

@@ -6,7 +6,7 @@
 [![Java CI with Gradle](https://github.com/cisco-open/test-telemetry-generator/actions/workflows/gradle.yml/badge.svg)](https://github.com/cisco-open/test-telemetry-generator/actions/workflows/gradle.yml)
 ![GitHub last commit](https://img.shields.io/github/last-commit/cisco-open/test-telemetry-generator)
 ![Open Issues](https://img.shields.io/github/issues/cisco-open/test-telemetry-generator)
-![Open PRs](https://img.shields.io//github/issues-pr/cisco-open/test-telemetry-generator)
+![Open PRs](https://img.shields.io/github/issues-pr/cisco-open/test-telemetry-generator)
 
 ![GitHub code size in bytes](https://img.shields.io/github/languages/code-size/cisco-open/test-telemetry-generator)
 <!--- Add more tags -->