Revise changelog for version 5.5.3

Updated changelog to reflect changes in version 5.5.3.

Author: danx123

README.md

@@ -19,9 +19,9 @@ Designed with a modern UI, comprehensive feature support, and lightweight perfor
 📝 Export PDF: Save images as PDFs
 
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-## Changelog v5.5.0
-- Macan Quick View changelog: - Added set as wallpaper (toolbar & context menu)
-- Macan Image Finder (Search by Image) changelog: Retranslate string
+## Changelog v5.5.3
+- Fixed some icons & strings
+- Improve Performance
 
 
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