Updated release notes

Author: kaklise

documentation/whatsnew/v1.3.0.rst

@@ -1,4 +1,4 @@
-v1.3.0 (main)
+Version 1.3.0 (January 20, 2025)
 ---------------------------------------------------
 WNTR version 1.3.0 includes the following updates:
 
@@ -12,4 +12,5 @@ WNTR version 1.3.0 includes the following updates:
 * Fixed bug in roughness unit conversion when using D-W by @kaklise in https://github.com/USEPA/WNTR/pull/450
 * Added base_demand, demand_pattern and demand_category attributes to GIS junction data by @angusmcb in https://github.com/USEPA/WNTR/pull/447
 * Fixed bug in documentation by @smaspons in https://github.com/USEPA/WNTR/pull/459
-* Fixed bug when using to_gis() with a model that includes a leak by @kbonney in https://github.com/USEPA/WNTR/pull/458
+* Fixed bug when using to_gis() with a model that includes a leak by @kbonney in https://github.com/USEPA/WNTR/pull/458
+* Added EPANET-MSX support to WNTR by @dbhart in https://github.com/USEPA/WNTR/pull/462