Update CHANGES.md for the 1.0.1 release

Author: dsnopek

CHANGES.md

@@ -0,0 +1,13 @@
+# Change history for the Godot Meta Toolkit plugin
+
+## 1.0.1
+- Fix `MetaPlatformSDK_LeaderboardEntry::get_extra_data()` and `MetaPlatformSDK_ChallengeEntry::get_extra_data()` to return `PackedByteArray`
+- Change `MetaPlatformSDK_Message.get_error()` method into `error` property
+- Encode `PackedStringArray` as UTF-8 before passing to underlying Meta Platform SDK functions
+- Get API documentation coverage up to 100% and other small documentation improvements
+- Remove `*_long` suffix from `MetaPlatformSDK_AssetFileDownloadUpdate.get_bytes_total_long()` and `.get_bytes_transferred_long()`
+
+## 1.0.0
+- Initial release
+- Support for Meta Platform SDK v71
+- Tool for configuring the Meta XR Simulator