Made web app sounds quieter

docs/releases.md

@@ -29,6 +29,11 @@ to [@Joeharrison94](https://github.com/Joeharrison94) for the input.
 **Bugs:**
 
 * `Upgrade` header check is now case in-sensitive ([#228](https://github.com/binwiederhier/ntfy/issues/228), thanks to [@wunter8](https://github.com/wunter8) for finding it)
+* Made web app sounds quieter ([#222](https://github.com/binwiederhier/ntfy/issues/222))
+
+**Thanks for testing:**
+
+Thanks to [@wunter8](https://github.com/wunter8) for testing.
 
 -->