Add NEWS bullet for PR 619

Author: jdblischak

NEWS.md

@@ -5,6 +5,10 @@
 - The minimal risk weighting strategy has been added to `gs_design_rd()` and `gs_power_rd()` for risk difference design (#611, #614, thanks to @LittleBeannie).
 - The `sequential_pval()` function has been added to calculate the sequential p-value for a AHR group sequential design (#605, thanks to @LittleBeannie).
 
+## Bug fixes
+
+- The text summary of a stratified design now reports the correct enrollment duration and hazard ratios (#617, #619, thanks to @jdblischak).
+
 # gsDesign2 1.1.8
 
 ## New features