Add the number of the PR

Author: 6Ulm

RELEASES.md

@@ -9,7 +9,7 @@
 - Added Free Support Sinkhorn Barycenter + example (PR #387)
 - New API for OT solver using function `ot.solve` (PR #388)
 - Backend version of `ot.partial` and `ot.smooth` (PR #388)
-- Added argument for warmstart of dual vectors in Sinkhorn-based methods in `ot.bregman` (PR #)
+- Added argument for warmstart of dual vectors in Sinkhorn-based methods in `ot.bregman` (PR #437)
 
 #### Closed issues