[Nominatim] Update CHANGELOG.md

Author: jbelien

src/Provider/Nominatim/CHANGELOG.md

@@ -2,6 +2,13 @@
 
 The change log describes what is "Added", "Removed", "Changed" or "Fixed" between each release.
 
+## 5.7.0
+
+### Added
+
+- Add support for PHP 8.2
+- Add support for address neighbourhood property
+
 ## 5.6.0
 
 ### Added