Update release notes

release-notes/8-x.md

@@ -1,4 +1,9 @@
 # Release Notes for PROSE SDK versions 8.x
+## [Release 8.27.0](https://www.nuget.org/packages/Microsoft.ProgramSynthesis/8.27.0) - 2023/09/25
+- Transformation.Formula
+  - Added an interface ILocalizedStrings to pass localized strings to be used in Python translation.
+  - Use numpy.floor and numpy.ceil in translation where appropriate.
+
 ## [Release 8.26.0](https://www.nuget.org/packages/Microsoft.ProgramSynthesis/8.26.0) - 2023/08/28
 - Common
   - Exposed the parameter for maximum tries to learn clustering after coverage stops improving.