update links to badges with current default branch

Author: driehle

README.md

@@ -1,7 +1,7 @@
 # DoctrineModule for Laminas
 
-[![Build Status](https://github.com/doctrine/DoctrineModule/actions/workflows/continuous-integration.yml/badge.svg)](https://github.com/doctrine/DoctrineModule/actions/workflows/continuous-integration.yml?query=branch%3A4.4.x)
-[![Code Coverage](https://codecov.io/gh/doctrine/DoctrineModule/branch/4.4.x/graphs/badge.svg)](https://codecov.io/gh/doctrine/DoctrineModule/branch/4.4.x)
+[![Build Status](https://github.com/doctrine/DoctrineModule/actions/workflows/continuous-integration.yml/badge.svg)](https://github.com/doctrine/DoctrineModule/actions/workflows/continuous-integration.yml?query=branch%3A5.2.x)
+[![Code Coverage](https://codecov.io/gh/doctrine/DoctrineModule/branch/5.2.x/graphs/badge.svg)](https://codecov.io/gh/doctrine/DoctrineModule/branch/5.2.x)
 [![Latest Stable Version](https://poser.pugx.org/doctrine/doctrine-module/v/stable.png)](https://packagist.org/packages/doctrine/doctrine-module)
 [![Total Downloads](https://poser.pugx.org/doctrine/doctrine-module/downloads.png)](https://packagist.org/packages/doctrine/doctrine-module)