Update 1.5.0.md

Author: rasamassen

docs/changes/1.x/1.5.0.md

@@ -7,6 +7,7 @@
 ### Bug fixes
 
 - Set writeAttribute return type by [@radarhere](https://github.com/radarhere) fixing [#2204](https://github.com/PHPOffice/PHPWord/issues/2204) in [#2776](https://github.com/PHPOffice/PHPWord/pull/2776)
+- Writers: Fix and implement underline styles in Word2007, ODText, and HTML writers by [@rasamassen](https://github.com/rasamassen) in [#2850](https://github.com/PHPOffice/PHPWord/pull/2850)
 
 ### Miscellaneous
 
@@ -16,4 +17,4 @@
 
 ### BC Breaks
 
-### Notes
+### Notes