[OpenCage] Update CHANGELOG.md

Author: jbelien

src/Provider/OpenCage/CHANGELOG.md

@@ -2,6 +2,17 @@
 
 The change log describes what is "Added", "Removed", "Changed" or "Fixed" between each release.
 
+## 4.7.0
+
+### Added
+
+-  Add support for PHP 8.2, 8.3, and 8.4
+-  Add support for confidence
+
+### Removed
+
+- Drop support for PHP 7.4
+
 ## 4.6.0
 
 ### Added