Update NEWS.md

Author: andrewherren

NEWS.md

@@ -2,7 +2,7 @@
 
 ## Bug Fixes
 
-* Fix `IndexError` when sampling a mean-only Python BART model with categorical covariates; the excluded-variable weight zero-out is now guarded by the forest-inclusion flags, matching the R implementation
+* Fix `IndexError` when sampling a mean-only Python BART model with categorical covariates; the excluded-variable weight zero-out is now guarded by the forest-inclusion flags, matching the R implementation [#411](https://github.com/StochasticTree/stochtree/pull/411)
 * Fix ordinal class prediction bug in R BART [#399](https://github.com/StochasticTree/stochtree/issues/399)
 
 # stochtree 0.4.4