chore: update README with hyperlink to issues in badge (#76)

Signed-off-by: Pierre-Yves Lapersonne <[email protected]>

README.md

@@ -29,7 +29,7 @@
 [![Still maintained](https://img.shields.io/maintenance/yes/2024?style=for-the-badge)](https://github.com/Orange-OpenSource/ouds-ios/issues?q=is%3Aissue+is%3Aclosed)
 
 [![Code size](https://img.shields.io/github/languages/code-size/Orange-OpenSource/ouds-ios?style=for-the-badge)](https://github.com/Orange-OpenSource/ouds-ios)
-[![Opened issues](https://img.shields.io/github/issues-raw/Orange-OpenSource/ouds-ios?style=for-the-badge)](https://github.com/Orange-OpenSource/ouds-ios)
+[![Opened issues](https://img.shields.io/github/issues-raw/Orange-OpenSource/ouds-ios?style=for-the-badge)](https://github.com/Orange-OpenSource/ouds-ios/issues)
 
 [![iOS 15.0](https://img.shields.io/badge/iOS-15.0-informational.svg?style=for-the-badge)](https://developer.apple.com/support/app-store "iOS 15 supports")