Update README.md

Author: rmraya

README.md

@@ -15,6 +15,7 @@ An open source UI for [OpenXLIFF Filters](https://github.com/rmraya/OpenXLIFF).
 
 Version | Comment | Release Date
 :------:|---------|:-----------:
+7.6.0 | Updated OpenXLIFF Filters to version 3.21.0 | September 4, 2024
 7.5.0 | Updated OpenXLIFF to version 3.20.0 | April 21, 2024
 7.4.0 | Updated OpenXLIFF to version 3.17.0; migrated to Java 21 | January 12, 2024
 7.3.0 | Updated OpenXLIFF to version 3.16.0 | October 31, 2023