fixing formatting in news file

NEWS.md

@@ -12,6 +12,7 @@
 Added 'Getting Started' vignette. 
 
 Added functions:
+
 - `bb_predict_survival_trend()`
 - `bb_predict_recruitment_trend()`
 - `bb_plot_year_trend_survival()`
@@ -21,6 +22,7 @@ Added functions:
 - `plot()` (plot traceplots for bboufit object)
 
 Added arguments:
+
 - `year_start = 4L` to `bb_fit_survival()` and `bb_fit_recruitment()` to set caribou year start month as integer - (default April)
 - `yearling_female_proportion = 0.5` to `bb_fit_recruitment()` to set yearling sex ratio
 - `year_trend = FALSE` to `bb_fit_survival()` and `bb_fit_recruitment()` to fit model with year trend