newsletter: Add link to Geolocation PR

Author: awesomekling

src/content/newsletters/2025-06-30.mdx

@@ -57,7 +57,7 @@ rendering tasks off the main thread, which can significantly improve the perform
 
 The Geolocation API allows websites to request and monitor the user's physical location, speed and heading. We have
 added preliminary support for this API in Ladybird, only returning a single emulated position for now. In the future we
-will hook this up to the system's location services together with the necessary permissions and privacy settings.
+will hook this up to the system's location services together with the necessary permissions and privacy settings. ([PR #5169](https://github.com/LadybirdBrowser/ladybird/pull/5169))
 
 ![](/assets/img/newsletter-june-2025-geolocation.png)