Update UPDATE.md for version 1.1.5.1

This commit includes updates to the UPDATE.md file for version 1.1.5.1. The changes include the improved saving system that now correctly saves the workspace, Lua code, workspace name, save date, and cc:be version.

UPDATE.md

@@ -1,8 +1,19 @@
 # Release Notes
 
+## Version 1.1.5.1 Update
+
+This minor update brings a significant improvement to the saving system of the ComputerCraft : Blockly Editor.
+
+### Changes
+- **Improved Saving System**: The saving system, which previously saved an empty object, has been fixed. It now correctly saves the workspace, Lua code, workspace name, save date, and cc:be version. This enhancement provides more context and information in each save file, improving the user's ability to manage and understand their saved data.
+
+**Full Changelog**: https://github.com/Sarxzer/cc-blockly-editor/compare/v1.1.5...v1.1.5.1
+
+---
+
 ## Version 1.1.5
 
-We're excited to announce the release of version 1.1.5 of the ComputerCraft Blockly Editor. This update brings some changes to the file format, security, and user interface.
+We're excited to announce the release of version 1.1.5 of the ComputerCraft : Blockly Editor. This update brings some changes to the file format, security, and user interface.
 
 ### Changes
 - **Downloaded Workspace File Format**: The downloaded workspace will now be a `.ccbe` file instead of a `.json`. This change is to standardize the file format for the Blockly editor.